{"id":4064,"date":"2016-05-06T11:49:00","date_gmt":"2016-05-06T06:19:00","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/"},"modified":"2023-03-22T16:46:29","modified_gmt":"2023-03-22T11:16:29","slug":"ncert-solutions-class-10-science-electricity-part-1","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/","title":{"rendered":"NCERT Solutions for Class 10 Science Electricity Part 1"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#NCERT_Class_10_Science_Chapter_wise_Solutions\" >NCERT Class 10 Science Chapter wise Solutions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#NCERT_Solutions_for_Class_10_Science_Electricity_Part_1\" >NCERT Solutions for Class 10 Science Electricity Part 1<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#1_What_does_an_electric_circuit_mean\" >1. What does an electric circuit mean?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#2_Define_the_unit_of_current\" >2. Define the unit of current.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#3_Calculate_the_number_of_electrons_constituting_one_coulomb_of_charge\" >3. Calculate the number of electrons constituting one coulomb of charge.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#1_Name_a_device_that_helps_to_maintain_a_potential_difference_between_across_a_conductor\" >1. Name a device that helps to maintain a potential difference between across a conductor.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#2_What_is_meant_by_saying_that_the_potential_difference_between_two_points_is_1_v\" >2. What is meant by saying that the potential difference between two points is 1 v?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#3_How_much_energy_is_given_to_each_coulomb_of_charge_passing_through_a_6-volt_battery\" >3. How much energy is given to each coulomb of charge passing through a 6-volt battery?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#2_Will_current_flow_more_easily_through_a_thick_wire_or_a_thin_wire_of_the_same_material_when_connected_to_the_same_source_Why\" >2. Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#3_Let_the_resistance_of_an_electric_component_remains_constant_while_the_potential_difference_across_the_two_ends_of_the_component_decreases_to_half_of_its_former_value_What_change_will_occur_in_the_current_through_it\" >3. Let the resistance of an electric component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#4_Why_are_coils_of_electric_toasters_and_electric_irons_made_of_an_alloy_rather_than_a_pure_metal\" >4. Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#5_Use_the_data_in_Table_122_to_answer_the_following\" >5. Use the data in Table 12.2 to answer the following:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#1_Draw_a_schematic_diagram_of_a_circuit_consisting_of_a_battery_of_three_cells_of_2_V_each_a_5_%CE%8F_resistor_8_%CE%8F_resistors_and_a_12_%CE%8F_and_a_plug_key_all_connected_in_series\" >1. Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V, each, a 5 \u038f resistor, 8 \u038f resistors and a 12 \u038f and a plug key, all connected in series.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#2_Redraw_the_circuit_of_question_1_putting_in_an_ammeter_to_measure_the_current_through_the_resistors_and_a_voltmeter_to_measure_the_potential_difference_across_the_12_%CE%8F_resistors_What_would_be_the_reading_in_the_ammeter_and_voltmeter\" >2. Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the 12 \u038f resistors. What would be the reading in the ammeter and voltmeter?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#1_Judge_the_equivalent_resistance_when_the_following_are_connected_in_parallel\" >1. Judge the equivalent resistance when the following are connected in parallel:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#2_An_electric_lamp_of_100_%CE%A9_a_toaster_of_resistance_50_%CE%A9_and_a_water_filter_of_resistance_500_%CE%A9_are_connected_in_parallel_to_a_220_V_source_What_is_the_resistance_of_an_electric_iron_connected_to_the_same_source_that_takes_as_much_current_as_all_three_appliances_and_what_is_the_current_through_it\" >2. An electric lamp of 100 \u03a9, a toaster of resistance 50 \u03a9 and a water filter of resistance 500 \u03a9 are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#3_What_are_the_advantages_of_connecting_electrical_devices_in_parallel_with_the_battery_instead_of_connecting_them_in_series\" >3. What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#4_How_can_three_resistors_of_resistance_2_%CE%A9_3_%CE%A9_and_6_%CE%A9_be_connected_to_give_a_total_resistance_of_a_4_%CE%A9_b_9_%CE%A9\" >4. How can three resistors of resistance 2 \u03a9, 3 \u03a9 and 6 \u03a9 be connected to give a total resistance of (a) 4 \u03a9 (b) 9 \u03a9?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#b_If_all_the_three_resistance_are_joined_in_parallel_the_resultant_resistance_will_be_3_%CE%A9\" >(b) If all the three resistance are joined in parallel the resultant resistance will be 3 \u03a9.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#5_What_is_a_the_highest_b_the_lowest_total_resistance_that_can_be_secured_by_combination_of_four_resistances_of_4_%CE%A9_8_%CE%A9_12_%CE%A9_and_24_%CE%A9\" >5. What is (a) the highest, (b) the lowest total resistance that can be secured by combination of four resistances of 4 \u03a9, 8 \u03a9, 12 \u03a9 and 24 \u03a9?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#1_Why_does_the_cord_of_an_electric_heater_not_glow_while_the_heating_element_does\" >1. Why does the cord of an electric heater not glow while the heating element does?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#2_Compute_the_heat_generated_while_transferring_96000_coulomb_of_charge_in_one_hour_through_a_potential_difference_of_50_V\" >2. Compute the heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#3_An_electric_iron_of_resistance_20_takes_a_current_of_5_A_Calculate_the_heat_developed_in_30_s\" >3. An electric iron of resistance 20 takes a current of 5 A. Calculate the heat developed in 30 s.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#1_What_determines_the_rate_at_which_energy_is_delivered_by_a_current\" >1. What determines the rate at which energy is delivered by a current?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#2_An_electric_motor_takes_5_A_from_a_220_V_line_Determine_the_power_of_the_motor_and_energy_consumed_in_2_h\" >2. An electric motor takes 5 A from a 220 V line. Determine the power of the motor and energy consumed in 2 h.<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#NCERT_Solutions_for_Class_10_Science\" >NCERT Solutions for Class 10 Science<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-10-science-electricity-part-1\/#CBSE_app_for_Students\" >CBSE app for Students<\/a><\/li><\/ul><\/nav><\/div>\n<p>NCERT Solutions for Class 10 Science Electricity Part 1 Class 10 Science Class book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE Board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 10 Science chapter wise NCERT solution for Science Book for all the chapters can be downloaded from our website and myCBSEguide mobile app for free.<\/p>\n<p style=\"text-align: center;\"><strong>NCERT solutions for Class 10 Science\u00a0Electricity <a class=\"button\" href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-10-science\/1176\/ncert-solutions\/5\/\">Download as PDF<\/a><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/10%20Science%20Book.jpg\" alt=\"NCERT Solutions for Class 10 Science Electricity Part 1\" width=\"209\" height=\"257\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Class_10_Science_Chapter_wise_Solutions\"><\/span><span class=\"underline-text\">NCERT Class 10 Science Chapter wise Solutions<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>1 \u2013 Chemical Reactions and Equations<\/li>\n<li>2 \u2013 Acids, Bases and Salts<\/li>\n<li>3 \u2013 Metals and Non-metals<\/li>\n<li>4 \u2013 Carbon and Its Compounds<\/li>\n<li>5 \u2013 Periodic Classification of Elements<\/li>\n<li>6 \u2013 Life Processes<\/li>\n<li>7 \u2013 Control and Coordination<\/li>\n<li>8 \u2013 How do Organisms Reproduce?<\/li>\n<li>9 \u2013 Heredity and Evolution<\/li>\n<li>10 \u2013 Light Reflection and Refraction<\/li>\n<li>11 \u2013 Human Eye and Colourful World<\/li>\n<li>12 \u2013 Electricity<\/li>\n<li>13 \u2013 Magnetic Effects of Electric Current<\/li>\n<li>14 \u2013 Sources of Energy<\/li>\n<li>15 \u2013 Our Environment<\/li>\n<li>16 \u2013 Management of Natural Resources<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_10_Science_Electricity_Part_1\"><\/span>NCERT Solutions for Class 10 Science Electricity Part 1<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_What_does_an_electric_circuit_mean\"><\/span><strong>1. What does an electric circuit mean?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>An electric circuit is a continuous and closed path of an electric current. If the electric circuit complete, current can flow through the circuit.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_Define_the_unit_of_current\"><\/span><strong>2. Define the unit of current.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>SI unit of electric current is Ampere. Current is said to be 1 ampere, if 1 coulomb charge flows per second across a cross-section of conductor.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"3_Calculate_the_number_of_electrons_constituting_one_coulomb_of_charge\"><\/span><strong>3. Calculate the number of electrons constituting one coulomb of charge.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>Charge on one electron = 1.6 x 10<sup>-19<\/sup> coulomb.<\/p>\n<p style=\"text-align: justify;\">No of electron in one coulomb of charge = 1\/1.6 x 10<sup>-19<\/sup><\/p>\n<p style=\"text-align: justify;\">= 6.25 x 10<sup>18<\/sup><\/p>\n<hr \/>\n<p><center><strong>Page No. 202<\/strong><\/center><\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_Name_a_device_that_helps_to_maintain_a_potential_difference_between_across_a_conductor\"><\/span><strong>1. Name a device that helps to maintain a potential difference between across a conductor.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>Battery<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_What_is_meant_by_saying_that_the_potential_difference_between_two_points_is_1_v\"><\/span><strong>2. What is meant by saying that the potential difference between two points is 1 v?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>The potential difference between two points is said to be 1 volt, if 1 joule of work is to be done for moving charge of 1 coulomb from one point to another.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"3_How_much_energy_is_given_to_each_coulomb_of_charge_passing_through_a_6-volt_battery\"><\/span><strong>3. How much energy is given to each coulomb of charge passing through a 6-volt battery?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>Potential difference (V) = 6 V<\/p>\n<p style=\"text-align: justify;\">Charge (Q) = 1 C<\/p>\n<p style=\"text-align: justify;\">Energy = total work done (W) = Q x V = 1&#215;6 = 6 joule.<\/p>\n<hr \/>\n<p><center>NCERT Solutions for Class 10 Science Electricity Part 1<\/center><strong>1. On what factor does the resistance of a conductor depend? <\/strong><\/p>\n<p><strong>Ans. <\/strong>The resistance of a conductor depends on<\/p>\n<p style=\"text-align: justify;\"><strong>i.<\/strong> length of conductor (l)<\/p>\n<p style=\"text-align: justify;\"><strong>ii.<\/strong> Area of cross-section (A)<\/p>\n<p style=\"text-align: justify;\"><strong>iii.<\/strong> Temperature<\/p>\n<p style=\"text-align: justify;\"><strong>iv.<\/strong> Nature of material used to make conductor<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_Will_current_flow_more_easily_through_a_thick_wire_or_a_thin_wire_of_the_same_material_when_connected_to_the_same_source_Why\"><\/span><strong>2. Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>The current flows more easily through a thick wire as compared to thin wire of the same material, when connected to the same source. It is due to the reason that resistance increases with decrease in thickness.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 10 Science Electricity Part 1<\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"3_Let_the_resistance_of_an_electric_component_remains_constant_while_the_potential_difference_across_the_two_ends_of_the_component_decreases_to_half_of_its_former_value_What_change_will_occur_in_the_current_through_it\"><\/span><strong>3. Let the resistance of an electric component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong> Ans. <\/strong>It is given that resistance R of the electrical component remains constant but the potential difference across the ends of the component decreases to half of its value.<\/p>\n<p style=\"text-align: justify;\">Hence, as per Ohm\u2019s law, new current also decreases to half of its original value.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"4_Why_are_coils_of_electric_toasters_and_electric_irons_made_of_an_alloy_rather_than_a_pure_metal\"><\/span><strong>4. Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>Coils of electric toasters and electric irons are made of an alloy due to the following reasons:<\/p>\n<p style=\"text-align: justify;\"><strong>i.<\/strong> Resistivity of an alloy is generally higher than that of pure metal.<\/p>\n<p style=\"text-align: justify;\"><strong>ii.<\/strong> At high temperature, an alloy does not oxidize readily. Hence, coil of an alloy has longer life.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"5_Use_the_data_in_Table_122_to_answer_the_following\"><\/span><strong>5. Use the data in Table 12.2 to answer the following:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>(a) Which among iron and mercury is a better conductor? <\/strong><\/p>\n<p style=\"text-align: justify;\"><strong>(b) Which material is the best conductor?<\/strong><\/p>\n<p><strong>Ans. (a) <\/strong>Iron is the better conductor than mercury.<\/p>\n<p style=\"text-align: justify;\"><strong>(b)<\/strong> Silver is the best conductor because its resistivity is the least.<\/p>\n<hr \/>\n<p><center>NCERT Solutions for Class 10 Science Electricity Part 1<\/center><\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_Draw_a_schematic_diagram_of_a_circuit_consisting_of_a_battery_of_three_cells_of_2_V_each_a_5_%CE%8F_resistor_8_%CE%8F_resistors_and_a_12_%CE%8F_and_a_plug_key_all_connected_in_series\"><\/span><strong>1. Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V, each, a 5 \u038f resistor, 8 \u038f resistors and a 12 \u038f and a plug key, all connected in series. <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>The schematic diagram of circuit is as follows:<\/p>\n<p><img decoding=\"async\" style=\"height: 144px; width: 288px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/10\/science\/ch12\/image001.png\" \/><\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 10 Science Electricity Part 1<\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_Redraw_the_circuit_of_question_1_putting_in_an_ammeter_to_measure_the_current_through_the_resistors_and_a_voltmeter_to_measure_the_potential_difference_across_the_12_%CE%8F_resistors_What_would_be_the_reading_in_the_ammeter_and_voltmeter\"><\/span><strong>2. Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the 12 \u038f resistors. What would be the reading in the ammeter and voltmeter? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong><\/p>\n<p><img decoding=\"async\" style=\"height: 171px; width: 288px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/10\/science\/ch12\/image002.png\" \/><\/p>\n<p>Here ammeter A has been joined in series of circuit and voltmeter V is joined in parallel to 12 ohms\u2019 resistor.<\/p>\n<p>Total voltage of battery V = 3&#215;2 = 6 V.<\/p>\n<p>Total resistance R = R<sub>1<\/sub>+ R<sub>2<\/sub>+ R<sub>3<\/sub> = 5 \u03a9 +8 \u03a9 +12 \u03a9 = 25 \u03a9<\/p>\n<p>Ammeter reading (current) = I = V\/R = 6\/25 = 0.24 A.<\/p>\n<p>Voltmeter reading = IR = 0.24 x 12 = 2.88 V.<\/p>\n<hr \/>\n<p><center>NCERT Solutions for Class 10 Science Electricity Part 1<\/center><\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_Judge_the_equivalent_resistance_when_the_following_are_connected_in_parallel\"><\/span><strong>1. Judge the equivalent resistance when the following are connected in parallel: <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>(a) 1 \u03a9 and 10<sup>6<\/sup> \u03a9<\/strong><\/p>\n<p style=\"text-align: justify;\"><strong>(b) 1 \u03a9, 10<sup>3<\/sup> \u03a9 and 10<sup>6<\/sup> \u03a9<\/strong><\/p>\n<p><strong>Ans. <\/strong>When the resistances are joined in parallel, the resultant resistance in parallel arrangement is given by:<\/p>\n<p>1\/R = 1\/R<sub>1<\/sub> + 1\/R<sub>2<\/sub> + 1\/R<sub>3 &#8212;&#8211; <\/sub><\/p>\n<p><strong>(a)<\/strong> 1\/R = 1\/1+ 1\/10<sup>6<\/sup> = 1+ 10<sup>-6 <\/sup><\/p>\n<p>R = 1 \u03a9<\/p>\n<p><strong>(b) <\/strong>1\/R = 1\/1 + 1\/10<sup>3 <\/sup>+ 1\/10<sup>6<\/sup> = 1 + 10<sup>-3<\/sup> + 10<sup>-6<\/sup><\/p>\n<p>R= 1 \u03a9<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 10 Science Electricity Part 1<\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_An_electric_lamp_of_100_%CE%A9_a_toaster_of_resistance_50_%CE%A9_and_a_water_filter_of_resistance_500_%CE%A9_are_connected_in_parallel_to_a_220_V_source_What_is_the_resistance_of_an_electric_iron_connected_to_the_same_source_that_takes_as_much_current_as_all_three_appliances_and_what_is_the_current_through_it\"><\/span><strong>2. An electric lamp of 100 \u03a9, a toaster of resistance 50 \u03a9 and a water filter of resistance 500 \u03a9 are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>Here, voltage (V) = 220 V<\/p>\n<p>R<sub>1 <\/sub>= 100 \u03a9, R<sub>2<\/sub> = 50 \u03a9 and R<sub>3<\/sub> = 500 \u03a9<\/p>\n<p>1\/R = 1\/R<sub>1<\/sub> + 1\/R<sub>2<\/sub> + 1\/R<sub>3 &#8212;&#8211;<\/sub><\/p>\n<p>1\/R = 1\/100+1\/50 +1\/500 = 16\/500<\/p>\n<p>R = 500\/16 = 31.25 \u03a9<\/p>\n<p style=\"text-align: justify;\">The resistance of electric iron, which draws as much current as all three appliances take together = R = 31.25 \u03a9.<\/p>\n<p style=\"text-align: justify;\">Current passing through electric iron (I) = V\/R = 220\/31.25 = 7.04 A.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 10 Science Electricity Part 1<\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"3_What_are_the_advantages_of_connecting_electrical_devices_in_parallel_with_the_battery_instead_of_connecting_them_in_series\"><\/span><strong>3. What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>Advantage of connecting electrical devices in parallel with the battery are as follows:<\/p>\n<p style=\"text-align: justify;\"><strong>(i)<\/strong> Voltage across each connecting electrical device is same and device take current as per its resistance.<\/p>\n<p style=\"text-align: justify;\"><strong>(ii)<\/strong> Separate on\/off switches can be applied across each device.<\/p>\n<p style=\"text-align: justify;\"><strong>(iii)<\/strong> Total resistance in parallel circuit decreases, hence, a great current may be drawn from cell.<\/p>\n<p style=\"text-align: justify;\"><strong>(iv)<\/strong> If one electrical device is damaged; then other devices continue to work properly.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"4_How_can_three_resistors_of_resistance_2_%CE%A9_3_%CE%A9_and_6_%CE%A9_be_connected_to_give_a_total_resistance_of_a_4_%CE%A9_b_9_%CE%A9\"><\/span><strong>4. How can three resistors of resistance 2 \u03a9, 3 \u03a9 and 6 \u03a9 be connected to give a total resistance of (a) 4 \u03a9 (b) 9 \u03a9?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. (a)<\/strong> If we connect resistance of 3 \u03a9 and 6 \u03a9 in parallel and then resistance of 2 \u03a9 is connected in series of the combination, then total resistance of combination is 4 \u03a9.<\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" id=\"Picture 23\" style=\"height: 109px; width: 249px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/10\/science\/ch12\/image003.jpg\" \/><\/p>\n<h6><span class=\"ez-toc-section\" id=\"b_If_all_the_three_resistance_are_joined_in_parallel_the_resultant_resistance_will_be_3_%CE%A9\"><\/span><strong>(b)<\/strong> If all the three resistance are joined in parallel the resultant resistance will be 3 \u03a9.<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><img decoding=\"async\" id=\"Picture 24\" style=\"height: 132px; width: 295px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/10\/science\/ch12\/image004.jpg\" \/><\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 10 Science Electricity Part 1<\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"5_What_is_a_the_highest_b_the_lowest_total_resistance_that_can_be_secured_by_combination_of_four_resistances_of_4_%CE%A9_8_%CE%A9_12_%CE%A9_and_24_%CE%A9\"><\/span><strong>5. What is (a) the highest, (b) the lowest total resistance that can be secured by combination of four resistances of 4 \u03a9, 8 \u03a9, 12 \u03a9 and 24 \u03a9? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. (a)<\/strong> To obtain highest resistance, all the four resistances must be connected in series arrangement. In that case resultant R = R<sub>1<\/sub> + R<sub>2<\/sub> + R<sub>3<\/sub><\/p>\n<p>= 4+8+12 48 \u03a9<\/p>\n<p><strong>(b)<\/strong> To obtain lowest resistance, all the four resistance must be connected in parallel arrangement. 1\/R = 1\/R<sub>1<\/sub> + 1\/R<sub>2<\/sub> + 1\/R<sub>3<\/sub><\/p>\n<p>= 1\/4 +1\/8 +1\/12 + 1\/24 = 12\/24 \u03a9<\/p>\n<p>= 24\/12 = 2 \u03a9<\/p>\n<hr \/>\n<p><center>NCERT Solutions for Class 10 Science Electricity Part 1<\/center><\/p>\n<h6><span class=\"ez-toc-section\" id=\"1_Why_does_the_cord_of_an_electric_heater_not_glow_while_the_heating_element_does\"><\/span><strong>1. Why does the cord of an electric heater not glow while the heating element does? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>Cord of heater and electric heater are joined in series and carry same current when joined to voltage source. As resistance of cord is extremely small as compared to that of heater element. hence, heat produced is extremely small in cord but much larger in heater element. So, the heating element begins to glow but cord does not glow.<\/p>\n<hr \/>\n<h6><span class=\"ez-toc-section\" id=\"2_Compute_the_heat_generated_while_transferring_96000_coulomb_of_charge_in_one_hour_through_a_potential_difference_of_50_V\"><\/span><strong>2. Compute the heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V. <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>Charge transferred (Q) = 96000 C, time = 1 hour = 60 x 60 = 3600 s and potential difference (V) = 50 V.<\/p>\n<p style=\"text-align: justify;\">Heat generated (H) = VIt = V.Q = 50 x 96000 = 4800000 j = 4.8 x 10<sup>6<\/sup> j.<\/p>\n<hr \/>\n<h6><span class=\"ez-toc-section\" id=\"3_An_electric_iron_of_resistance_20_takes_a_current_of_5_A_Calculate_the_heat_developed_in_30_s\"><\/span><strong>3. An electric iron of resistance 20 takes a current of 5 A. Calculate the heat developed in 30 s. <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>Resistance of electric iron (R) = 20 \u03a9, current (I) = 5 A and time = 30 s.<\/p>\n<p style=\"text-align: justify;\">Heat generated (H) = I<sup>2<\/sup>Rt = 5<sup>2<\/sup> x 20 x 30 = 15000 j.<\/p>\n<hr \/>\n<p><center>NCERT Solutions for Class 10 Science Electricity Part 1<\/center><\/p>\n<h6><span class=\"ez-toc-section\" id=\"1_What_determines_the_rate_at_which_energy_is_delivered_by_a_current\"><\/span><strong>1. What determines the rate at which energy is delivered by a current? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>Electric power determines the rate at which energy is delivered by a current.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 10 Science Electricity Part 1<\/p>\n<h6><span class=\"ez-toc-section\" id=\"2_An_electric_motor_takes_5_A_from_a_220_V_line_Determine_the_power_of_the_motor_and_energy_consumed_in_2_h\"><\/span><strong>2. An electric motor takes 5 A from a 220 V line. Determine the power of the motor and energy consumed in 2 h. <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>It is given that current drawn by electric motor (I) = 5 A. the line voltage V = 220 V time (t) = 2 h.<\/p>\n<p style=\"text-align: justify;\">Power of motor (P) = P = VI = 220 x 5 = 1100 W and the energy consumed (E) = Pt<\/p>\n<p style=\"text-align: justify;\">1100 W x 2 h = 2200 Wh or 2.2 kWh.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_10_Science\"><\/span>NCERT Solutions for Class 10 Science<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>NCERT Solutions Class 10 Science PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 10 Science includes text book solutions from Book. NCERT Solutions for CBSE Class 10 Science have total 16 chapters. 10 Science NCERT Solutions in PDF for free Download on our website. Ncert Science class 10 solutions PDF and Science ncert class 10 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_app_for_Students\"><\/span>CBSE app for Students<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To download\u00a0NCERT Solutions for class 10 Social Science, Computer Science, Home Science,Hindi ,English, Maths Science do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. 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