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Q.

Consider a solenoid with 0.3 T magnetic field inside it. 8 cm long wire placed inside the solenoid perpendicularFind the magnetic force acting on a to its axis if the wire carry 10 A current:

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a

0.14 N

b

0.24 N

c

0.34 N

d

0.44 N

answer is B.

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Detailed Solution

F = I lB sinθ Here,  θ=90∘, I=10A, I=8 cm = 8 × 10−2 m, B = 0.3 T∴  F = 10 × 8 × 10−2 × 0.3× sin90∘ = 0.24 N
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