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Q.

A wire carrying 100A is bent into a circular loop of 5cm radius. The flux density at its centre in tesla is

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a

22.56 × 10–4

b

12.56 × 10–4

c

40.06 × 10–4

d

23.08 × 10–4

answer is C.

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Detailed Solution

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B=μ0i2r;B=4π×10−7×1002×5×10−2=12.56×10−4T

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