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Four point charges +q,+q,-q and -q are p...

Four point charges `+q,+q,-q and -q` are placed on the corners of a square of side length 'a' as shown in the figure. The magnitude of electric field at a point which is at a distance `x (gt gt a)` from the centre along a line perpendicular to the plane of the square and passing through the centre is

A

`(sqrt(2)qa)/(4pi epsilon_()x^(2))`

B

`(qa)/(2pi epsilon_(0)x^(3))`

C

`(sqrt(2)qa)/(2pi epsilon_(0)x^(3))`

D

`(qa)/(4pi epsilon_(0)x^(3))`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Charges q, 2q,3q and 4q are placed at the corners A,B,C and D of a square as shown in the following figure. The directon of electric field at the centre of the square is along

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    A
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    B
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