Charge Behaviour

Q. A soap bubble is given a negative charge, then its radius

1. Nothing can be predicted as information is insufficient
2. Decreases
3. Increases
4. Remains unchanged

Q.

A body can be negatively charged by

1. Giving excess of electrons to it

2. Removing some neutrons from it

3. Removing some electrons from it

4. Giving some protons to it

Q.

A body can be negatively charged by

1. removing some electrons from it

2. removing some neutrons from it

3. giving some protons to it

4. giving excess of electrons to it

Q.

In the given picture the Ring A at the bottom is positively charged. Another Ring B is brought and placed over it. Ring B hovers at a certain height above A. What could be the charge on Ring B?

1. Negative

2. Neutral

3. Can’t say

4. Positive

Q.

Objects A, B and C are three identical, spherical conductors. Originally A and B both have charges of +3 mC, while C has a charge of –6 mC. Object A and C are allowed to touch, then they are moved apart. Then objects B and C are allowed to touch, and they are moved apart.

If Object A and B are now held near each other, they will

1. attract

2. repel

3. have no effect on each other

4. First attract to a certain position then repel

Q.

What are the mobile charge carriers in a conductor?

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Q. Ram wants to find out if a metal sphere is charged.

He took a new metal sphere, charged it positive and brought close to the first one. He noticed that they attract when close. He concluded that the first sphere must be negatively charged.
Did Ram get it right?

1. Yes

2. No

Q. Five balls numbered 1 to 5 are suspended using separate threads. Pairs (1, 2), (2, 4) and (4, 1) show electrostatic attraction, while pair (2, 3) and (4, 5) show repulsion. Therefore ball 1 must be

1. Positively charged
2. Negatively charged
3. Neutral
4. Made of metal

Q. Out of gravitational, electromagnetic, Vander Waals, electrostatic and nuclear forces; which two are able to provide an attractive force between two neutrons

1. Electrostatic and gravitational
2. Electrostatic and nuclear
3. Gravitational and nuclear
4. Some other forces like Vander Waals

Q. A soap bubble is given a negative charge, then its radius

1. Decreases
2. Increases
3. Nothing can be predicted as information is insufficient
4. Remains unchanged