Foundation
Physics Foundation
Magnetism
Question
The pole faces of a permanent magnet as shown in the figure. A wire of length 4 cm, carrying a current of 10A is placed in the central region, where the magnetic field is 0.2 T. The magnitude of the force on the wire is :
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Solution
Length of wire = 4 cm = 0.04m
magnetic field, B = 0.2 T
current, I = 10A
Force, F = BI = 0.2 × 10 × 0.04
F = 0.08 N
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