Two metallic spheres of radii 1cm and 3 ...

Two metallic spheres of radii 1cm and 3 cm are given charges of `-1xx10^-2C` and `5xx10^-2C`. Respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is

`2xx10^(_2)C`

`3xx10^(_2)C`

`4xx10^(_2)C`

`1xx10^(_2)C`

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