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Q.

A charge 'Q' is placed at each corner of a cube of side 'a'. The potential at the centre of the cube is

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a

4Q3πϵ0a

b

8QπE0a

c

4Qπϵ0a

d

4Q4πϵ0a

answer is C.

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Detailed Solution

Distance of each charge from the centre =32a

Net potential at the centre

=814πε0Qd=814πε032a=4Q3πε0a

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