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A metallic sphere has a charge of 10 mu ...

A metallic sphere has a charge of `10 mu C`. A unit negative charge is brought from `A` to `B` both `100 cm` away from the sphere but `A` being east of it while `B` being on west. The net work done is

A

Zero

B

`2//10` joule

C

`-2//10` joule

D

`-1//10` joule

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A
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