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Q.

A very long wire carrying a current I=5.0 A is bent at right angles. Find the magnetic induction at a point lying on a perpendicular normal to the plane of the wire drawn through the point of bending at a distance l=35 cm from it.

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a

2.0 μT

b

2.0 T

c

3.0 μT

d

2 μT

answer is A.

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Detailed Solution

Bnet=B2+B2=2B

where, B=μ0i4πrsin 0°+sin 90°

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A very long wire carrying a current I=5.0 A is bent at right angles. Find the magnetic induction at a point lying on a perpendicular normal to the plane of the wire drawn through the point of bending at a distance l=35 cm from it.