A spherical drop of water carrying a cha...

A spherical drop of water carrying a charge of `3 xx 10^(-10) C` has potential of `500V` at its surface. When two such drops having same charge and radius combine to from a single spherical drop, what is the potential at the surface of the new drop?

`594 V`

`794 V`

`694 V`

`894 V`

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