ELECTRICC CHARGES AND FIELD

An isolated point charge particle produces an electric field E at a point 3 m away from it. The distance of the point at which the field is & will be

• 2m

• 3m

• 4m

• 6m

Beams of electrons and protons move parallel to each other in the same direction. They:

1. attract each other

2. repel each other

3. neither attract nor repel

4. force of attraction or repulsion depends upon speed of beam

• 1. attract each other

• 1. repel each other

• 1. neither attract nor repel

• 1. force of attraction or repulsion depends upon speed of beam

Two point charges placed in a medium of dielectric constant 5 are at a distance r between them, experience an electrostatic force ' F'. The electrostatic force between them in vacuum at the same

distance r will be:

• 5F

• F

In an experiment three microscopic latex spheres are sprayed into a chamber and became charged with charges +3e, +5e and -3e respectively. All the three spheres came in contact simultaneously for a moment and got separated. Which one of the following are possible values for the final charge on the spheres?

• 1. +5e, - 1e, +5e

• 1. +6e, +6e, - 7e

• 1. - 4e, +3.5e, +5.5e

• 1. +5e, - 8e, + 7e

An object has charge of 1C and gains 5.0 × 1018 electrons. The net charge of the object becomes:

• 1. - 0.80C

• 1. +0.80C

• 1. +4.80C

• 1. +0.20C