Q.

Find the magnetic field at P due to the arrangement shown

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a

μ0i2πd(112)

b

2μ0i2πd

c

μ0i2πd

d

μ0i2πd(1+12)

answer is A.

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Detailed Solution

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BP=2[μ04π.i(d2)(sin90°sin45°)]

=μ0i2πd(112)

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Find the magnetic field at P due to the arrangement shown