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When two bodies are charged by rubbing them together, they acquire equal and opposite charge.

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Important Questions on Electricity and Magnetism

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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge

What is a conductor of electricity? Give two examples.

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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Two identical conducting spheres A and B carry equal charge. They are initially separated by a distance much larger than their diameters and the force between them is F. A third identical conducting sphere C is uncharged. Sphere C is first touched to A, then to C and removed. As a result, the force between A and B now is
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
What are conductors? Give two examples.
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Two isolated conducting spheres S1 and S2 of radius 23R and 13R have 12 μC and -3 μC charges, respectively, and are at a large distance from each other, They are now connected by a conducting wire. A long time after this is done the charges on S1 and S2 are respectively:
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Why are metals good conductors of electricity whereas glass is a bad conductor of electricity? Give reason.
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Rubber or plastic is used for covering electrical wires. Why?
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Answer in one word.
The insulating material used to make gloves.
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
All metals are good conductors of electricity.
MEDIUM
Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
How will you show that an object is an electric conductor or an insulator?
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Wood is an _____ material.
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Choose the odd one out.
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Why is it advised not to touch an electric switch, plug or device with wet hands?
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Does air conduct electricity?
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Which of the following is a conductor?
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge

Conductors and insulators are equally important for us. Give reasons.

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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Which of the following materials is an insulator?  
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
Electric current can easily flow through copper.
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge
What do we need to make a device which works on electricity?
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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge

Fill in the blank spaces by choosing correct words from the list given below.

List: open circuit, insulator, terminal, circuit, chemicals

Rubber is a good example of electric _____.

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Physics>Electromagnetism- 1>Electricity and Magnetism>Electric Charge

The statements given below are incorrect. Write the correct statements.

3. Mica is an example of a good conductor of electricity.