A charge -3 muC is placed at one corner ...

A charge -3 `mu`C is placed at one corner of cube of side 9 cm . The potential at a point P which diagonally opposite as shown in fugure is

A

`-sqrt3 xx10^5` J/C

B

`2sqrt3 xx10^4` J/C

C

`-9sqrt3 xx10^5` J/C

D

`4sqrt3 xx10^4` J/C

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The correct Answer is:

A

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