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Q.

The wire shown in figure carries a current of 32 A. if r = 3.14cm, the magnetic field at point P will be

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a

4.8×10−4T

b

1.6×10−4T

c

3.2×10−4T

d

6.4×10−4T

answer is C.

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Detailed Solution

B=3π2.2πμoi2r=384π×10−7×323.14×10−2=4.8×10−4T

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