Q. 64.9( 7 Votes )

If a body is charged by rubbing it, its weight
A. remains precisely constant

B. increases slightly

C. decreases slightly

D. may increase slightly or may decrease slightly.

Answer :

On charging a body by rubbing it, there are two possibilities to happen: Either the body acquires a positive charge or a negative charge.


As q=ne (where q is the amount of charge acquired on a body, n is the number of electrons transferred from or on the body and e is the charge on one electron.)


In case the body acquires a positive charge, there is loss of electrons from that body, therefore, its mass decreases.


In case the body acquires a negative charge, there is gain of electrons from that body, therefore, its mass increases.


So, on charging a body, its mass may increase or may decrease slightly.

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