Methods of Charging

Q.

What is charging by conduction?

Q.

Distinguish between charging by conduction and charging by induction?

Q. The charge can be generated by conduction or induction or friction ?

Q.

An uncharged insulator can be charged by induction.

1. True

2. False

Q. Which of the following cannot be charged easily by friction?

1. Plastic scale
2. Copper rod
3. Woollen cloth
4. Inflated balloon

Q.

Describe the various steps involved in charging a gold-leaf electroscope by induction.

Q. An uncharged conductor can be charged by .

1. induction
2. radiation
3. convection

Q. Why don't the protons at the center of the atom repel

Q.

Static electricity can be produced by

1. Only induction

2. Only friction

3. Only chemical reaction

4. Induction and friction

Q. The factor responsible for charging a conductor through conduction is:

1. Transfer of protons
2. Transfer of neutrons
3. Transfer of electrons
4. (a) and (c) above.

Q.

Charging by friction is accompanied by loss or gain of electrons. State which body loses electrons when a glass rod is rubbed with silk,

Q. A metalic sphere is suspended between 2 plates A and B.
The plate A is negatively charged while plate B is neutral and earthed.
The spehere is seen oscillating towards the plate A touches it and then it moves to plate B.
It again swings from plate B to plate A continuously.
1) Why does the sphere move towards plate A first?
2) Why does it oscillate towards B?
3) Why does the sphere keep moving continuously?

Q.

What happens when a similar charge is placed on a soap bubble?

1. Its radius decreases

2. Its radius increases

3. The bubble collapses

4. None of these

Q.

Describe the method of charging a conductor by conduction.

Q.

When a body is charged by conduction, it acquires a charge of the opposite nature.

1. True
2. False

Q.

Static electric charges do not move on their own.

1. True
2. False

Q.

Give an example of a bad conductor.

Q.

Describe the various steps to charge a body positively by induction.

Q.

The strips of an electroscope diverge when a charged body is brought in contact with the metal clip. Now the clip is touched gently by our hand. What will happen to the strips? Explain.

Q. Which of the following cannot be charged by touching with a charged copper rod?

1. Glass
2. Silver
3. Ebonite
4. Mercury

Q.

Explain the transfer of charges in the ebonite rod.

Q.

State two ways of charging a conductor.

Q.

Name the way of charging a conductor in which the charge is shared.

Q. Q1. Why do you think charging by rubbing happens best in dry weather?
Q2. Is an ebonite rod a conductor or insulator of charge?

Q.

A charged object attracts an uncharged object by producing opposite charge in the nearer end of the uncharged object by the process of:

(a) electric potential (b) electric induction

(c) friction (d) electromagnetic induction

Q.

A charged ebonite rod______ tiny bits of paper

Q.

Why do charges flow through metal but not plastic?

Q.

Two metal balls are suspended as shown in the figure. A glass rod is rubbed with silk to make it charged. Now, both the balls are individually touched with this glass rod. What would we observe?

1. The balls attract each other.
2. The balls repel each other.
3. The balls will heat up.
4. Neither attraction nor repulsion

Q.

If an uncharged conductor is charged through induction, it acquires _________ charge.

Q.

What is transfer of charges and give 2examples in our daily lives?