Question

If a body is charged by rubbing, its weight:
A. Remains precisely constant
B. Increase slightly
C. Decrease slightly
D. May increase slightly or decrease slightly

Answer 1

Hint: Charging by rubbing is the phenomenon in which the two objects are rubbed together to produce electric charge. The force of friction will enable the electrons to transfer from one body to the other. The weight of the object will depend on the mass of the electrons.

Complete answer:
Rubbing of the objects is a familiar phenomenon in which electrons are transferred from one body to the other by friction. Now, consider two objects rubbed together. Now, if the objects will be insulators and the surrounding will be dry, then the object will acquire equal and opposite charge and the force of attraction will develop between them.
Now, here three conditions will arise:
-The body ,that will lose electrons, will become positively charged.
-The body ,that will gain electrons, will become negatively charged.
The force that will act between the charges of opposite sign, will be the force of attracting
Now, as we know that the electrons will be interchanged when the two bodies. The bodies will gain or lose electrons. Therefore, when the body will gain electrons, the mass of the body will increase. On the other hand, when the body will lose electrons, the mass of the body will decrease. Therefore, we can say that if a body is charged by rubbing, its weight may increase slightly or decrease slightly.

Hence, option D is the correct option.

Note:In the above solution, we have used the terms that the body will lose or gain electrons. This means that when the body will lose electrons, it will be transferred to the other body in contact. On the hand, when the body will gain electrons, it will be transferred from the other body in contact.