{"id":4417,"date":"2018-04-21T03:49:00","date_gmt":"2018-04-20T22:19:00","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-and-field-part-1\/"},"modified":"2018-10-22T12:17:28","modified_gmt":"2018-10-22T06:47:28","slug":"ncert-solutions-class-12-physics-electric-charges-field-part-1","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/","title":{"rendered":"NCERT Solutions class 12 physics Electric Charges and Field 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-12-physics-electric-charges-field-part-1\/#NCERT_Class_12_Physics_Chapter-wise_Solutions\" >NCERT Class 12 Physics 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-12-physics-electric-charges-field-part-1\/#CHAPTER_1_ELECTRIC_CHARGES_AND_FIELDS\" >CHAPTER 1 ELECTRIC CHARGES AND FIELDS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#NCERT_Solutions_class_12_physics_Electric_Charges_and_Field_Part_1\" >NCERT Solutions class 12 physics Electric Charges and Field Part 1<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#1_What_is_the_force_between_two_small_charged_spheres_having_charges_of_and_placed_30_cm_apart_in_air\" >1: What is the force between two small charged spheres having charges of\u00a0 and placed 30 cm apart in air?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#2_The_electrostatic_force_on_a_small_sphere_of_charge_due_to_another_small_sphere_of_charge_%E2%80%93_in_air_is_a_What_is_the_distance_between_the_two_spheres_b_What_is_the_force_on_the_second_sphere_due_to_the_first\" >2: The electrostatic force on a small sphere of charge due to another small sphere of charge &#8211; in air is \u00a0(a) What is the distance between the two spheres? (b) What is the force on the second sphere due to the first?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#3_Check_that_the_ratio_is_dimensionless_Look_up_a_Table_of_Physical_Constants_and_determine_the_value_of_this_ratio_What_does_the_ratio_signify\" >3: Check that the ratio \u00a0is dimensionless. Look up a Table of Physical Constants and determine the value of this ratio. What does the ratio signify?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#4_a_Explain_the_meaning_of_the_statement_%E2%80%98electric_charge_of_a_body_is_quantised\" >4: (a) Explain the meaning of the statement &#8216;electric charge of a body is quantised&#8217;.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#5_When_a_glass_rod_is_rubbed_with_a_silk_cloth_charges_appear_on_both_A_similar_phenomenon_is_observed_with_many_other_pairs_of_bodies_Explain_how_this_observation_is_consistent_with_the_law_of_conservation_of_charge\" >5: When a glass rod is rubbed with a silk cloth, charges appear on both. A similar phenomenon is observed with many other pairs of bodies. Explain how this observation is consistent with the law of conservation of charge.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#6_Four_point_charges_C_%E2%80%93C_C_and_%E2%80%93C_are_located_at_the_corners_of_a_square_ABCD_of_side_10_cms_What_is_the_force_on_a_charge_of_1_C_placed_at_the_centre_of_the_square\" >6 : Four point charges \u00a0= C, = &#8211;C, = C, and = &#8211;C are located at the corners of a square ABCD of side 10 cms. What is the force on a charge of 1 C placed at the centre of the square?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#7_a_An_electrostatic_field_line_is_a_continuous_curve_That_is_a_field_line_cannot_have_sudden_breaks_Why_not\" >7 : (a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#8_Two_point_charges_C_and_are_located_20_cm_apart_in_vacuum\" >8 : Two point charges \u00a0C and \u00a0are located 20 cm apart in vacuum.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#9_A_system_has_two_charges_C_and_C_located_at_points_A_and_respectively_What_are_the_total_charge_and_electric_dipole_moment_of_the_system\" >9 : A system has two charges C and \u00a0C located at points A: and respectively. What are the total charge and electric dipole moment of the system?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#10_An_electric_dipole_with_dipole_moment_is_aligned_at_with_the_direction_of_a_uniform_electric_field_of_magnitude_Calculate_the_magnitude_of_the_torque_acting_on_the_dipole\" >10:\u00a0An electric dipole with dipole moment is aligned at with the direction of a uniform electric field of magnitude Calculate the magnitude of the torque acting on the dipole.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#11_A_polythene_piece_rubbed_with_wool_is_found_to_have_a_negative_charge_of\" >11:\u00a0\u00a0 A polythene piece rubbed with wool is found to have a negative charge of<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#12_a_Two_insulated_charged_copper_spheres_A_and_B_have_their_centers_separated_by_a_distance_of_50_cm_What_is_the_mutual_force_of_electrostatic_repulsion_if_the_charge_on_each_iss_The_radii_of_A_and_B_are_negligible_compared_to_the_distance_of_separation\" >12:\u00a0(a) Two insulated charged copper spheres A and B have their centers separated by a distance of 50 cm. What is the mutual force of electrostatic repulsion if the charge on each iss? The radii of A and B are negligible compared to the distance of separation.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#13_Suppose_the_spheres_A_and_B_in_Exercise_112_have_identical_sizes_A_third_sphere_of_the_same_size_but_uncharged_is_brought_in_contact_with_the_first_then_brought_in_contact_with_the_second_and_finally_removed_from_both_What_is_the_new_force_of_repulsion_between_A_and_B\" >13:\u00a0Suppose the spheres A and B in Exercise 1.12 have identical sizes. A third sphere of the same size but uncharged is brought in contact with the first, then brought in contact with the second, and finally removed from both. What is the new force of repulsion between A and B?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#14_Figure_133_shows_tracks_of_three_charged_particles_in_a_uniform_electrostatic_field_Give_the_signs_of_the_three_charges_Which_particle_has_the_highest_charge_to_mass_ratio\" >14:\u00a0Figure 1.33 shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass ratio?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#15_Consider_a_uniform_electric_field_a_What_is_the_flux_of_this_field_through_a_square_of_10_cm_on_a_side_whose_plane_is_parallel_to_the_yz_plane_b_What_is_the_flux_through_the_same_square_if_the_normal_to_its_plane_makes_a_angle_with_the_x-axis\" >15: Consider a uniform electric field . (a) What is the flux of this field through a square of 10 cm on a side whose plane is parallel to the yz plane? (b) What is the flux through the same square if the normal to its plane makes a angle with the x-axis?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#16_What_is_the_net_flux_of_the_uniform_electric_field_of_Exercise_115_through_a_cube_of_side_20_cm_oriented_so_that_its_faces_are_parallel_to_the_coordinate_planes\" >16:\u00a0What is the net flux of the uniform electric field of Exercise 1.15 through a cube of side 20 cm oriented so that its faces are parallel to the coordinate planes?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#17_Careful_measurement_of_the_electric_field_at_the_surface_of_a_black_box_indicates_that_the_net_outward_flux_through_the_surface_of_the_box_is_a_What_is_the_net_charge_inside_the_box_b_If_the_net_outward_flux_through_the_surface_of_the_box_were_zero_could_you_conclude_that_there_were_no_charges_inside_the_box_Why_or_Why_not\" >17:\u00a0Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface of the box is\u00a0. (a) What is the net charge inside the box? (b) If the net outward flux through the surface of the box were zero, could you conclude that there were no charges inside the box? Why or Why not?<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/#NCERT_Solutions_for_Class_12_Physics\" >NCERT Solutions for Class 12 Physics<\/a><\/li><\/ul><\/nav><\/div>\n<p>NCERT Solutions class 12 physics Electric Charges and Field Part 1 Class 12 Physics 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 12 Physics chapter wise NCERT solution for Physics part 1 and Physics part 2 for all the chapters can be downloaded from our website and myCBSEguide mobile app for free.<\/p>\n<p><strong>Download <a href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-12-physics\/1251\/ncert-solutions\/5\/\">NCERT solutions for Electric Charges and Field<\/a> as PDF.<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/Class%2012%20physics%20book%2012.jpg\" alt=\"NCERT Solutions class 12 physics Electric Charges and Field Part 1\" width=\"132\" height=\"161\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Class_12_Physics_Chapter-wise_Solutions\"><\/span><strong>NCERT Class 12 Physics Chapter-wise Solutions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>1 &#8211; Electric Charges and Fields<\/li>\n<li>2 &#8211; Electrostatic Potential and Capacitance<\/li>\n<li>3 &#8211; Current Electricity<\/li>\n<li>4 &#8211; Moving Charges and Magnetism<\/li>\n<li>5 &#8211; Magnetism and Matter<\/li>\n<li>6 &#8211; Electromagnetic Induction<\/li>\n<li>7 &#8211; Alternating Current<\/li>\n<li>8 &#8211; Electromagnetic Waves<\/li>\n<li>9 &#8211; Ray Optics and Optical Instruments<\/li>\n<li>10 &#8211; Wave Optics<\/li>\n<li>11 &#8211; Dual Nature of Radiation and Matter<\/li>\n<li>12 &#8211; Atoms<\/li>\n<li>13 &#8211; Nuclei<\/li>\n<li>14 &#8211; Semiconductor Electronic: Material, Devices and Simple Circuits<\/li>\n<li>15 &#8211; Communication Systems<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"CHAPTER_1_ELECTRIC_CHARGES_AND_FIELDS\"><\/span><strong>CHAPTER 1 ELECTRIC CHARGES AND FIELDS<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>1.1 Introduction<\/li>\n<li>1.2 Electric Charges<\/li>\n<li>1.3 Conductors and Insulators<\/li>\n<li>1.4 Charging by Induction<\/li>\n<li>1.5 Basic Properties of Electric Charge<\/li>\n<li>1.6 Coulomb\u2019s Law<\/li>\n<li>1.7 Forces between Multiple Charges<\/li>\n<li>1.8 Electric Field<\/li>\n<li>1.9 Electric Field Lines<\/li>\n<li>1.10 Electric Flux<\/li>\n<li>1.11 Electric Dipole<\/li>\n<li>1.12 Dipole in a Uniform External Field<\/li>\n<li>1.13 Continuous Charge Distribution<\/li>\n<li>1.14 Gauss\u2019s Law<\/li>\n<li>1.15 Application of Gauss\u2019s Law<\/li>\n<\/ul>\n<h2 style=\"text-align: left;\"><span class=\"ez-toc-section\" id=\"NCERT_Solutions_class_12_physics_Electric_Charges_and_Field_Part_1\"><\/span>NCERT Solutions class 12 physics Electric Charges and Field Part 1<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_What_is_the_force_between_two_small_charged_spheres_having_charges_of_and_placed_30_cm_apart_in_air\"><\/span><strong>1: What is the force between two small charged spheres having charges of\u00a0 <img decoding=\"async\" style=\"height: 21px; width: 77px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image001.png\" \/>and <img decoding=\"async\" style=\"height: 21px; width: 73px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image002.png\" \/>placed 30 cm apart in air? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_The_electrostatic_force_on_a_small_sphere_of_charge_due_to_another_small_sphere_of_charge_%E2%80%93_in_air_is_a_What_is_the_distance_between_the_two_spheres_b_What_is_the_force_on_the_second_sphere_due_to_the_first\"><\/span><strong>2: The electrostatic force on a small sphere of charge <img decoding=\"async\" style=\"height: 21px; width: 52px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image011.png\" \/>due to another small sphere of charge &#8211; <img decoding=\"async\" style=\"height: 21px; width: 52px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image012.png\" \/>in air is <img decoding=\"async\" style=\"height: 19px; width: 44px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image013.png\" \/>\u00a0(a) What is the distance between the two spheres? (b) What is the force on the second sphere due to the first? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4><span class=\"ez-toc-section\" id=\"3_Check_that_the_ratio_is_dimensionless_Look_up_a_Table_of_Physical_Constants_and_determine_the_value_of_this_ratio_What_does_the_ratio_signify\"><\/span><strong>3: Check that the ratio <img decoding=\"async\" style=\"height: 23px; width: 47px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image027.png\" \/><img decoding=\"async\" style=\"height: 25px; width: 39px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image028.png\" \/>\u00a0is dimensionless. Look up a Table of Physical Constants and determine the value of this ratio. What does the ratio signify? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4><span class=\"ez-toc-section\" id=\"4_a_Explain_the_meaning_of_the_statement_%E2%80%98electric_charge_of_a_body_is_quantised\"><\/span><strong>4: (a) Explain the meaning of the statement &#8216;electric charge of a body is quantised&#8217;. <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong>(b) Why can one ignore quantisation of electric charge when dealing with macroscopic i.e., large scale charges? <\/strong><\/p>\n<h4><span class=\"ez-toc-section\" id=\"5_When_a_glass_rod_is_rubbed_with_a_silk_cloth_charges_appear_on_both_A_similar_phenomenon_is_observed_with_many_other_pairs_of_bodies_Explain_how_this_observation_is_consistent_with_the_law_of_conservation_of_charge\"><\/span><strong>5: When a glass rod is rubbed with a silk cloth, charges appear on both. A similar phenomenon is observed with many other pairs of bodies. Explain how this observation is consistent with the law of conservation of charge. <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"6_Four_point_charges_C_%E2%80%93C_C_and_%E2%80%93C_are_located_at_the_corners_of_a_square_ABCD_of_side_10_cms_What_is_the_force_on_a_charge_of_1_C_placed_at_the_centre_of_the_square\"><\/span><strong>6 : Four point charges <em><img decoding=\"async\" style=\"height: 21px; width: 23px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image041.png\" \/><\/em>\u00a0= <img decoding=\"async\" style=\"height: 21px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image042.png\" \/>C, <img decoding=\"async\" style=\"height: 21px; width: 25px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image043.png\" \/>= &#8211;<img decoding=\"async\" style=\"height: 21px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image044.png\" \/>C, <img decoding=\"async\" style=\"height: 21px; width: 25px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image045.png\" \/>= <img decoding=\"async\" style=\"height: 21px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image042.png\" \/>C, and <img decoding=\"async\" style=\"height: 21px; width: 25px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image046.png\" \/>= &#8211;<img decoding=\"async\" style=\"height: 21px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image044.png\" \/>C are located at the corners of a square ABCD of side 10 cms. What is the force on a charge of 1 <img decoding=\"async\" style=\"height: 18px; width: 15px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image047.png\" \/>C placed at the centre of the square? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4><span class=\"ez-toc-section\" id=\"7_a_An_electrostatic_field_line_is_a_continuous_curve_That_is_a_field_line_cannot_have_sudden_breaks_Why_not\"><\/span><strong>7 : (a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong>(b) Explain why two field lines never cross each other at any point? <\/strong><\/p>\n<h4><span class=\"ez-toc-section\" id=\"8_Two_point_charges_C_and_are_located_20_cm_apart_in_vacuum\"><\/span><strong>8 : Two point charges <img decoding=\"async\" style=\"height: 21px; width: 25px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image053.png\" \/><img decoding=\"async\" style=\"height: 19px; width: 25px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image054.png\" \/>\u00a0<img decoding=\"async\" style=\"height: 18px; width: 15px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image047.png\" \/>C and <img decoding=\"async\" style=\"height: 21px; width: 57px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image055.png\" \/><img decoding=\"async\" style=\"height: 18px; width: 15px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image047.png\" \/><img decoding=\"async\" style=\"height: 19px; width: 15px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image056.png\" \/>\u00a0are located 20 cm apart in vacuum. <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong>(a) What is the electric field at the midpoint O of the line AB joining the two charges? <\/strong><\/p>\n<p><strong>(b) If a negative test charge of magnitude <img decoding=\"async\" style=\"height: 21px; width: 89px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image057.png\" \/>is placed at this point, what is the force experienced by the test charge? <\/strong><\/p>\n<h4><span class=\"ez-toc-section\" id=\"9_A_system_has_two_charges_C_and_C_located_at_points_A_and_respectively_What_are_the_total_charge_and_electric_dipole_moment_of_the_system\"><\/span><strong>9 : A system has two charges <img decoding=\"async\" style=\"height: 25px; width: 39px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image079.png\" \/><img decoding=\"async\" style=\"height: 21px; width: 69px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image080.png\" \/>C and <img decoding=\"async\" style=\"height: 21px; width: 62px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image081.png\" \/><img decoding=\"async\" style=\"height: 21px; width: 69px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image080.png\" \/>\u00a0C located at points A: <img decoding=\"async\" style=\"height: 27px; width: 114px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image082.png\" \/>and <img decoding=\"async\" style=\"height: 27px; width: 147px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image083.png\" \/>respectively. What are the total charge and electric dipole moment of the system? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"10_An_electric_dipole_with_dipole_moment_is_aligned_at_with_the_direction_of_a_uniform_electric_field_of_magnitude_Calculate_the_magnitude_of_the_torque_acting_on_the_dipole\"><\/span><strong>10:\u00a0An electric dipole with dipole moment <img decoding=\"async\" style=\"height: 21px; width: 77px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image095.png\" \/>is aligned at <img decoding=\"async\" style=\"height: 19px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image096.png\" \/>with the direction of a uniform electric field of magnitude <img decoding=\"async\" style=\"height: 21px; width: 90px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image097.png\" \/>Calculate the magnitude of the torque acting on the dipole. <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"11_A_polythene_piece_rubbed_with_wool_is_found_to_have_a_negative_charge_of\"><\/span><strong>11:\u00a0\u00a0 A polythene piece rubbed with wool is found to have a negative charge of <img decoding=\"async\" style=\"height: 21px; width: 64px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image106.png\" \/><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\"><strong>(a) Estimate the number of electrons transferred (from which to which?) <\/strong><\/p>\n<p style=\"text-align: justify;\"><strong>(b) Is there a transfer of mass from wool to polythene? <\/strong><\/p>\n<h4><span class=\"ez-toc-section\" id=\"12_a_Two_insulated_charged_copper_spheres_A_and_B_have_their_centers_separated_by_a_distance_of_50_cm_What_is_the_mutual_force_of_electrostatic_repulsion_if_the_charge_on_each_iss_The_radii_of_A_and_B_are_negligible_compared_to_the_distance_of_separation\"><\/span><strong>12:\u00a0(a) Two insulated charged copper spheres A and B have their centers separated by a distance of 50 cm. What is the mutual force of electrostatic repulsion if the charge on each is<img decoding=\"async\" style=\"height: 21px; width: 81px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image118.png\" \/>s? The radii of A and B are negligible compared to the distance of separation. <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong>(b) What is the force of repulsion if each sphere is charged double the above amount, and the distance between them is halved? <\/strong><\/p>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"13_Suppose_the_spheres_A_and_B_in_Exercise_112_have_identical_sizes_A_third_sphere_of_the_same_size_but_uncharged_is_brought_in_contact_with_the_first_then_brought_in_contact_with_the_second_and_finally_removed_from_both_What_is_the_new_force_of_repulsion_between_A_and_B\"><\/span><strong>13:\u00a0Suppose the spheres A and B in Exercise 1.12 have identical sizes. A third sphere of the same size but uncharged is brought in contact with the first, then brought in contact with the second, and finally removed from both. What is the new force of repulsion between A and B? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4><span class=\"ez-toc-section\" id=\"14_Figure_133_shows_tracks_of_three_charged_particles_in_a_uniform_electrostatic_field_Give_the_signs_of_the_three_charges_Which_particle_has_the_highest_charge_to_mass_ratio\"><\/span><strong>14:\u00a0Figure 1.33 shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass ratio? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" id=\"Picture 38\" class=\"alignnone\" style=\"height: 78px; width: 234px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image147.jpg\" alt=\"NCERT Solutions class 12 physics Electric Charges and Field\" width=\"234\" height=\"78\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"15_Consider_a_uniform_electric_field_a_What_is_the_flux_of_this_field_through_a_square_of_10_cm_on_a_side_whose_plane_is_parallel_to_the_yz_plane_b_What_is_the_flux_through_the_same_square_if_the_normal_to_its_plane_makes_a_angle_with_the_x-axis\"><\/span><strong>15: Consider a uniform electric field <img decoding=\"async\" style=\"height: 21px; width: 94px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image148.png\" \/><img decoding=\"async\" style=\"height: 19px; width: 43px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image149.png\" \/>. (a) What is the flux of this field through a square of 10 cm on a side whose plane is parallel to the <em>yz<\/em> plane? (b) What is the flux through the same square if the normal to its plane makes a <img decoding=\"async\" style=\"height: 19px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image150.png\" \/>angle with the <em>x<\/em>-axis? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4><span class=\"ez-toc-section\" id=\"16_What_is_the_net_flux_of_the_uniform_electric_field_of_Exercise_115_through_a_cube_of_side_20_cm_oriented_so_that_its_faces_are_parallel_to_the_coordinate_planes\"><\/span><strong>16:\u00a0What is the net flux of the uniform electric field of Exercise 1.15 through a cube of side 20 cm oriented so that its faces are parallel to the coordinate planes? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4><span class=\"ez-toc-section\" id=\"17_Careful_measurement_of_the_electric_field_at_the_surface_of_a_black_box_indicates_that_the_net_outward_flux_through_the_surface_of_the_box_is_a_What_is_the_net_charge_inside_the_box_b_If_the_net_outward_flux_through_the_surface_of_the_box_were_zero_could_you_conclude_that_there_were_no_charges_inside_the_box_Why_or_Why_not\"><\/span><strong>17:\u00a0Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface of the box is<img decoding=\"async\" style=\"height: 21px; width: 131px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch01\/image165.png\" \/>\u00a0. (a) What is the net charge inside the box? (b) If the net outward flux through the surface of the box were zero, could you conclude that there were no charges inside the box? Why or Why not? <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_12_Physics\"><\/span><strong>NCERT Solutions for Class 12 Physics<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>NCERT Solutions Class 12 Physics PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 12 physics includes text book solutions from both part 1 and part 2. NCERT Solutions for CBSE Class 12 Physics have total 20 chapters. 12 Physics NCERT Solutions in PDF for free Download on our website. Ncert physics class 12 solutions PDF and physics ncert class 12 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide<\/p>\n<p>To download\u00a0NCERT Solutions for class 12 Physics, Chemistry, Biology, History, Political Science, Economics, Geography, Computer Science, Home Science, Accountancy, Business Studies and Home 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. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n<div id=\"wp_rp_first\" class=\"wp_rp_wrap wp_rp_plain\">\n<div class=\"wp_rp_content\"><\/div>\n<\/div>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions class 12 physics Electric Charges and Field Part 1 Class 12 Physics 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 &#8230; <a title=\"NCERT Solutions class 12 physics Electric Charges and Field Part 1\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-electric-charges-field-part-1\/\" aria-label=\"More on NCERT Solutions class 12 physics Electric Charges and Field Part 1\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":-1,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[281,1433],"tags":[283,1342,216,319],"class_list":["post-4417","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ncert-solutions","category-physics-cbse-class-12","tag-cbse-study-material","tag-class-12","tag-ncert-solutions","tag-physics"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NCERT Solutions class 12 physics Electric Charges and Field<\/title>\n<meta name=\"description\" content=\"NCERT Solutions class 12 physics Electric Charges and Field Part 1 in PDF format for free download. 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