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Manipal Entrance Test 2014 Physics Paper

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Question : 36

Total: 60

A wire in the form of a square of side a carries a current i. Then, the magnetic induction at the centre of the square wire is (magnetic permeability of free space =µ0 ).

µ0i
2πa
µ0i√2
πa
2√2µ0i
πa
µ0i
√2πa

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