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Question

# Eight charges, 1 μC,-7 μC,-4 μC,10 μC,2 μC,-5 μC,-3 μC and 6 μC are situated at the eight corners of the cube of side 20 cm. A spherical surface of 80 cm radius encloses this cube. The centre of this sphere coincides with the center of the cube. Then, the total ongoing flux from the spherical surface (in units of Vm) is

A
36π×103
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B
684π×103
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C
zero
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D
none of these
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Solution

## The correct option is C zeroAdding all the charges enclosed in the surface from which we need to calculate the flux. 1-7-4+10+2-5-3+6=0 Sum of the all charges enclosed is zero. So, the net flux is zero.

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