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Q.

A point charge Q is placed at the centre of a cube, another point charge Q is placed at one edge of the cube and a third charge is placed at one corner of the cube. Then the net electric flux over the entire surface of the cube is

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a

Q∈o

b

9Q8∈o

c

11Q8∈o

d

3Q8∈o

answer is C.

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Detailed Solution

detailed_solution_thumbnail

Net charge enclosed by the cube, Qnet =Q+Q8+Q4=11Q8.

∴Net  flux over the entire surface of the cube=Qnet∈o=11Q8∈o

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