1.

The spheres of radius r and R having charge q and Q respectively on them . When they are joined with conducting ,wire, the energy of this system does not dissipated then ...........

Answer»

QR= QR
qR=Qr
`qr^(2)=QR^(2)`
`qR^(2)=Qr^(2)`

Solution :When both spheres are JOINED, they are in parallel, HENCE the POTENTIAL on both the spheres are equal.`:. V_(r) =V_(R):. (kq)/(r)=(kQ)/(R):. (Q)/(r)=(Q)/(R) :. qR=Qr`


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