is there any variation of mass of a charged body give reason
Yes there may be variation in the mass of charged body.
Take this simple example:
If a body was initially neutral and somehow it is made to attain a positive charge that means that
electrons from its valance shell have departed thus the mass is reduced though not momentarily.
Take this simple example:
If a body was initially neutral and somehow it is made to attain a positive charge that means that
electrons from its valance shell have departed thus the mass is reduced though not momentarily.