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Q.

A circular arc of wire subtends an angle π2 at the centre. If it carries a current 2 A and radius of arc is 5 cm then the magnetic induction at the centre is

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a

4π×10−6T

b

π×10−6T

c

2π×10−6T

d

2π×10−8T

answer is C.

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Detailed Solution

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B=μ0iθ4πr=2π×10-6 T

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