Find the net magnetic filed at the centre (O) of the rectangle.
A
2μ0Iπ(√b2+a2ab)
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B
2μ0Iπ(√b2+a2ab2)
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C
2μ0Iπ(√b2+a2a2b)
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D
2μ0Iπ(√b2+a2(ab)2)
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Solution
The correct option is A2μ0Iπ(√b2+a2ab) For the given rectangle, side AB and CD are equal in length and carries same current, hence they will produce same field at the centre of the loop. Similarly, side BC and DA will produce same field at the centre of the loop.