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Q.

An infinitely long wire carrying current I is along Y-axis such that its one end is at point A(0, b) while the wire extends upto +∞. The magnitude of magnetic field strength at point (a, 0)

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a

μ0I4πa1+ba2+b2

b

μ0I4πa1−ba2+b2

c

μ0I4πaba2+b2

d

None of these

answer is B.

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Detailed Solution

B=μ04πia(1−sin⁡α)

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B=μ04πia1−ba2+b2

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