Q Four charges q, 2q, -4q and 2q are placed in order at the four corners of a square - Physics - Physical World

Question

Q Four charges q, 2q, -4q and 2q are placed in
order at the four corners of a square of side b The net field at
the centre of the square is

Vijay Shankar Yadav · Accepted Answer

Dear Student,
Here net field  on center due to charge  A and C=14πε05qb/22AC→net field  on center due to charge  B and D=14πε0(2-2)qb/22=0net field on center charge =14πε05qb/22=104πε0qb2AC→
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Q. Four charges q, 2q, -4q and 2q are placed in order at the four corners of a square of side b. The net field at the centre of the square is