CBSE > Class 10 > Science | CBSE Board | Homework Help

When the temperature of the heater becomes greater than the temperature of the surrounding, some of the heat is lost to the surroundings in the form of thermal radiations.
After some time, rate at which heat is being produced becomes equal to the rate of which heat is lost. Hence, the temperature of the element becomes constant.

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How is a voltmeter connected in the circuit to measure potential difference between two points ??

Posted by Shubham Saxena ???? 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Shubham Saxena ???? 5 years, 3 months ago

Thank you for answering my question. welldone

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Satyam Lodhi Rajput 5 years, 3 months ago

Parallel

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Yogita Ingle 5 years, 3 months ago

To measure the potential difference between two points, a voltmeter should be connected in parallel to the points.

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Rudraksh Rai Udaiwal 5 years, 3 months ago

In parallel

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Sanskriti Mathur 5 years, 3 months ago

In parallel

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Why is an alternating current considered to be advantageous over direct current for long range transmission of electric energy ??

Posted by Shubham Saxena ???? 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Shubham Saxena ???? 5 years, 3 months ago

Thank you.

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Yogita Ingle 5 years, 3 months ago

Alternating current is considered advantageous over direct current. AC is suitable than DC for transmission of electric power over long distances without loss of energy. The basic reason is, alternating voltage can be stepped up or stepped down using a transformer.

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With the help of an example explain how indiscriminate use of pesticides may result in the degradation of the environment.??

Posted by Shubham Saxena ???? 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Shubham Saxena ???? 5 years, 3 months ago

Thank you for answering.

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Yogita Ingle 5 years, 3 months ago

Indiscriminate use of pesticides may result in the degradation of the environment. For example, DDT is an organic pesticide which is used to kill pests in crop fields. When it is used in large quantity it can be passed along the food chain from crops to man or other animals and birds and can harm them.

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A copper wire has a resistance of 0.6 ohm another copper wire of the same mass as the first one is double in length of the first find the distance of the second wire

Posted by Harshita Raj 5 years, 3 months ago

CBSE > Class 10 > Science

0 answers

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Name the reagent which is able to dissolve gold and platinum?

Posted by Maahi ......♾ 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Maahi ......♾ 5 years, 3 months ago

Thanks everyone...... for answering my questions....

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Shubham Saxena ???? 5 years, 3 months ago

Gold and platinum don't react with almost any chemical . And aqua regia is the chemical mixture 1 . Hydrochloric acid and 3 parts of nitric acid this mixture can be dissolve gold and platinum . Thank you

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John Pothen 5 years, 3 months ago

Aqua Regis(formed by 3 parts of nitric acid and 1 HCL)

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Yogita Ingle 5 years, 3 months ago

Gold and Platinum belong to class of noble metals in the sense that gold and platinum do not react with almost any chemical reagent.
Aqua Regia is the chemical mixture which consists of 3 parts of concentrated hydrochloric acid and 1 part of concentrated nitric acid and this mixture can dissolve gold and platinum. The reaction is as follows:

Au + HNO₃ + 4 HCl → HAuCl₄ + NO + 2 H₂O

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Taniya Khathuria 5 years, 3 months ago

"regal water" or "king's water" is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange (sometimes red) fuming liquid, so named by alchemists because it can dissolve the noble metals, gold and platinum

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Draw a neat labelled diagram of structural and functional unit of expcertion in human

Posted by G.Mohammed Fayaz✨ Fz Fayaz 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 1 month ago

The functional unit of the kidney responsible for excretion is the nephron . Each kidney contains about one million nephrons. The nephron has three primary regions that function in the renal excretion process: the glomerulus , proximal tubule, and the distal tubule. The kidneys remove urea and other wastes from the blood through tiny filtering units called nephrons. Nephrons (Figure below) are tiny, tube-shaped structures found inside each kidney. Each kidney has up to a million nephrons. Each nephron collects a small amount of fluid and waste from a small group of capillaries.

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obtain an expression for the heat produced in a conductor when a voltage v is applied across it when 10 v battery is connected across and unknown resistance, there is 2.5 A in the circuit . find value of resistance and heat produced in 10 minutes

Posted by Jessica Khatra 5 years, 3 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is the definition of Electromagnet?

Posted by Fallen Warrior 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

The temporary magnet produced by electricity is called an electromagnet.

Uses -

They are used in telephones , telegraphs, electric motors, electric bells etc
Powerful electromagnets are used in cranes
Bullet trains use the principle of electromagnetism
The most important use of electromagnets is in electric motors

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ANSWER

Explain joule 's law of heating

Posted by Layba Hussain 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

A . 5 years, 3 months ago

Joules law of heating states that heat is equal to product of I²×t×R

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Rohini Patil 5 years, 3 months ago

Joule's law of heating states,that when current passes through a conductor of resistance for a time then the heat which is developed in the conductor is same or equal to the product of the square of the current, resistance and time.

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ANSWER

Is regeneration is also a reproduction method? Why

Posted by Pankti Sharma 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Gauri Sharma 5 years, 3 months ago

Regeneration is a type of asexual reproduction method. But it is not a true reproduction. In reproduction organisms give birth to young ones but in regeneration the cutted part of a body is regenerated.

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A . 5 years, 3 months ago

Yeah it is asexual reproduction which take place in planaria tale of lizard

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Meghna Thapar 5 years, 3 months ago

Regeneration is a type of asexual reproduction in which the organism is capable of regrowing certain body parts. Regeneration occurs via mitosis. Lizards can regenerate their tails, star fish can regenerate their arms while humans have the ability to regenerate their liver to a certain extent. Regeneration is considered as a method of reproduction because it is the ability of an organism to give rise new individual organism from their body parts.

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How does magnesium metel is harmful for us

Posted by Anirudh Jaat From Haryana 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Priya ✧*｡٩(๑˙╰╯˙๑)و✧*｡ 5 years, 3 months ago

Magnesium is a mineral that’s found naturally in many foods and in your body. However, as with most things, there are dangers associated with getting too much. A magnesium overdose can lead to what is technically known as hypermagnesemia. This is when there’s too much magnesium in your blood. It can occur in people with chronic health conditions, such as chronic kidney disease, although it’s rare.

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Hiiiiiii everyone

Posted by ꧁༒ Shaurya༻ 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Priya ✧*｡٩(๑˙╰╯˙๑)و✧*｡ 5 years, 3 months ago

hello

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꧁༒ Shaurya༻ 5 years, 3 months ago

Hyy

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Priya ✧*｡٩(๑˙╰╯˙๑)و✧*｡ 5 years, 3 months ago

hello?

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꧁༒ Shaurya༻ 5 years, 3 months ago

0Thank You

Kartik Raushan 5 years, 3 months ago

Hai

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ANSWER

What is double solar energy

Posted by Faisal Azeez 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years ago

Solar power systems with double-sided (bifacial) solar panels -- which collect sunlight from two sides instead of one -- and single-axis tracking technology that tilts the panels so they can follow the sun are the most cost effective to date, researchers report.

Advantages of Solar Energy

Renewable Energy Source. Among all the benefits of solar panels, the most important thing is that solar energy is a truly renewable energy source. ...
Reduces Electricity Bills. ...
Diverse Applications. ...
Low Maintenance Costs. ...
Technology Development. ...
Cost. ...
Weather Dependent. ...
Solar Energy Storage Is Expensive.

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ANSWER

Pls explain mole systm clearly????????????????

Posted by Isha Dhankhad 5 years, 3 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Which type of magnetic field does a current carrying coin has?

Posted by Lakshay Gupta 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 2 months ago

A coil of current-carrying wire is otherwise known as a solenoid; it is often referred to as an electromagnet. ... The right diagram shows a cross-section of the same coil. The black circles represent where the current is flowing out of the coil and the black represent where it flows into the coils. The magnetic field around a current carrying coil is produced due to the current flowing through it. It is uniform throughout. It is just like the magnetic field of a bar magnet. If needles of a magnetic compass are arranged around the coil, they will arrange themselves in North to South direction.

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An object of height 1m is placed on a distance of 2f from a convex lens .what is the height of the image formed?

Posted by Anamika Singh 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Seenu B 5 years, 3 months ago

Placed at 2f

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Dr.Kanchan Mansukhani 5 years, 3 months ago

Placed at 2f*

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Dr.Kanchan Mansukhani 5 years, 3 months ago

1m as it is placed at 2r

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ANSWER

Chemosynthesis

Posted by Kshama Pandey 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

It refers to the synthesis of organic compounds by bacteria or other living organisms using energy derived from reactions involving inorganic chemicals (such as carbon dioxide and water), typically in the absence of sunlight. It is limited to certain bacteria and fungi.

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Cheap and affordable credit is crucial for the country's development. Give Six reasons.

Posted by Charu Gupta 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Charu Gupta 5 years, 3 months ago

Thanks for the answer...

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Yogita Ingle 5 years, 3 months ago

Cheap and affordable credit is crucial for the country's development due to the following factors:

More lending would lead to higher incomes and encourage people to invest in agriculture, engage in business and set up small scale industries.
Cheap credit means more income would be left with the borrower to reinvest rather than return as interest. This leads to acceleration of economic activity.
Cheap credit would also allow weaker sections of society to enter formal sector of lending and rid them of exploitation at the hands of informal moneylenders. Thus, it may improve the economic condition of the poor and landless.

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ANSWER

Which blood vessel brings deoxygentated blood to the heart

Posted by Khushal Kumar 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Aryan Patel 5 years, 3 months ago

Vens

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Seenu B 5 years, 3 months ago

Veins

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Charu Gupta 5 years, 3 months ago

Answer is Veins..

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Abhinay Dwivedi 5 years, 3 months ago

Veins

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Sanjana R 5 years, 3 months ago

Generally veins are engaged in collecting the deoxygenated blood. But vena cava is the vessel mainly engaged in bringing deoxygenated blood to heart from different parts of body

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Name a plants in which stometa are usually absent

Posted by Akansha ..... 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Isha Dhankhad 5 years, 3 months ago

Yeast

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Deepak Kumar Mahto 5 years, 3 months ago

Yeast

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Charu Gupta 5 years, 3 months ago

The right answer is Hydrilla..

3Thank You

Gurpreet Singh Batth 5 years, 3 months ago

U can search on google

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Maahi ......♾ 5 years, 3 months ago

Stomata are usally absent in hydrilla. It is a submerged plant that grows under water.its narrow leaves have no stomata at all.they breathe through their body surface.

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Give an example of chemical reaction in which heat is absorbed due to which temperature falls

Posted by Shailesh Gond 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Seenu B 5 years, 3 months ago

Nacl---na+cl2

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Nehal Arora 5 years, 3 months ago

endothermic reactions like any thermal decomposition reaction CaCO3 → CaO + CO2.

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Explain,,,Whole reproduction process??

Posted by Adarsh Awasthi 5 years, 3 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

photo synthisies

Posted by Arpan Agrawal 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Prachi Jain 5 years, 3 months ago

Aal the green plants make their own food with the help of chlorophyll in the presence of sunlight and walter

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Seenu B 5 years, 3 months ago

This is the process were the plants make their own food

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Kshama Pandey 5 years, 3 months ago

This process which produces their food from simple inorganic material . In the presence of sunlight

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Nikita Garg?? 5 years, 3 months ago

They are the process of where the plant make there food own itself presence of sunlight ???????????

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Adarsh Awasthi 5 years, 3 months ago

A process by which plants prepare there own food with the help of carbondioxide, sunlight, oxygen and water................. .. 6CO²+ 12H²O ==== carbohydrate + water + energy ( ATP)

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I have recently asked questions. Answer my questions .

Posted by Shubham Saxena ???? 5 years, 3 months ago

CBSE > Class 10 > Science