Charge

Q.

What are two kinds of electricity?

Q. An infinite number of charges, each of q coulomb, are placed along x- axis at x=1m, 3m, 9m and so on. Calculate the electric field at the point x=0, due to these charges if all the charges are of the same sign?

Q.

Which of the following statements is not true?

1. When you rub a plastic scale on dry hair, it acquires a charge.

2. A glass rod when rubbed with silk acquires a negative charge.

3. Static charges are called so because they do not move by themselves.

4. Lightning and sparks from woolen clothing are essentially the same phenomena.

Q.

When a plastic comb is rubbed with dry hair, it acquires some charges due to which it attracts tiny pieces of paper. But when a plastic comb is rubbed with wet or oiled hair the same does not happen. Why?

Q. What happens if a charged body is brought near an uncharged body?

1. It induces the same charge on the uncharged body.
2. It induces an opposite charge on the uncharged body.
3. The two bodies repel each other.
4. The two bodies attract each other.

Q.

State Conservation of charge.

Q.

Two objects repel each other. This repulsion could be due to

1. Frictional force only

2. Electrostatic force only

3. Magnetic force only

4. Either electrostatic or magnetic force

Q.

If a body has a positive charge, then what does it mean?

Q.

What is the net charge on an atom?

Q.

The magnitude of the charge of a single electron or proton is $1.6\times {10}^{-19}C$. What is the net charge of a particle that has 20 electrons and 22 protons?

1. $+3.2\times {10}^{-19}C$

2. $-3.2\times {10}^{-19}C$

3. $+1.6\times {10}^{-19}C$

4. $-1.6\times {10}^{-19}C$

Q.

Why is an Electron Negative?

Q.

Two charged bodies are brought near each other. What is most liekly to happen?

1. There will be no effect

2. They will attract each other

3. They will repel each other

4. They might attract or repel based on the type of charges

Q.

Name two good and bad conductors of electricity

Q.

If two streams of protons move parallel to each other in the same direction, then they

Q. A positively charged body comes in contact with a neutral body. Choose the correct statement.

1. Both the bodies become positively charged.
2. Both the bodies become negatively charged.
3. Both the bodies become neutral.
4. Insufficient data.

Q.

A body gets positively charged due to………. of electrons.

Q.

What do you understand by electricity at rest?

Q. In an atom, positively charged particles called are present at the centre and revolve around it.

1. protons
2. electrons
3. neutrons
4. nuclei

Q. Give two examples of effects in your daily life which are caused by transfer of charges.

Q. Explain how a piece of styrofoam gets charged when it is rubbed with a piece of paper.

Q. Question 21
Two thermocol balls held close to each other move away from each other. When they are released, name the force which might be responsible for this phenomenon. Explain.

Q. If the number of protons present in a body is the number of electrons, the body is positively charged.

1. greater than
2. less than
3. equal to

Q.

A capacitor consists of

1. two dielectrics

2. two insulators

3. two conductors

4. two neutral plates

Q.

An insulator which is placed between the two plates of capacitor is called ___.

1. dielectric

2. capacitor

3. inductor

4. rheostat

Q. Easy example of charging by induction

Q.

Can the electric charge be created or destroyed?

Q.

When some electrons are removed from an uncharged body, it

1. gets positively charged

2. gets negatively charged

3. remains neutral

4. Can't say

Q.

In a gold leaf electroscope, the degree of divergence of gold leaves is an indicator of?

Q.

When charges flow, they form an electric current.

1. False

2. True

Q.

What do you mean by conservation of charges?