Question

One metallic sphere A is given a positive charge whereas another identical metallic sphere B of the exactly same mass as of A is given an equal amount of negative charge. Then

• A. Mass of A and mass of B still remain equal
• B. Mass of A increases
• C. Mass of Bdecreases
• D. Mass of Bincreases

Answer 1

Answer: (D)

. Mass of Bincreases.

So let's understand basic logic behind charging, in simple terms giving positive charge means somehow we extract electrons from it. So the body in deficit of electrons therefore we call the body positively charged.

As we extract electron, along with number of electrons its mass also in deficit in the body.
Sphere A is given as a positive charge so it will lose some electrons hence its mass will decrease. Sphere B is given as a negative charge so it will gain some electrons hence its mass will increase.