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Four long straight wires are located at the corners of a square `ABCD`. All the wires carry equal currents. Current in the wires `A` and `B` are inwards and in `C` and `D` are outwards. The magnetic field at the centre `O` is along

A

`AD`

B

`CB`

C

`AB`

D

`CD`

Text Solution

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The correct Answer is:
D
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