A magnetized steel wire 31.4 cm long has pole strength of 0.2 Am. It is then bent in the form of a semicircle. What is the magnetic moment of the semicircle?
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Text Solution
Verified by ExpertsThe correct answer is:
A
When the wire is bent in the form of a semicircle of radius r, then
Distance between the two ends of the wire
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Magnetic lines of force: