1.

Consider a system composed of two metallic spheres of radii r_(1) and r_(2) conneced by a thin wire and switch S as shown in the figure. Initially S is in open position. And the spheres carry charges q_(1) and q_(2) respectively. If the switch is closed, the potential of the system is

Answer»

`(1)/(4pi epsilon_(0))(q_(1)q_(2))/(r_(1)r_(2))`
`(1)/(4pi epsilon_(0))((q_(1)+q_(2))/(r_(1)+r_(2)))`
`(1)/(4pi epsilon_(0))((q_(1))/(r_(1))+(q_(2))/(r_(2)))`
`(1)/(4pi epsilon_(0))((q_(1)+q_(2))/(SQRT(r_(1)r_(2))))`

Answer :B


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