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A magnet when placed perpendicular to a uniform field of strength 10-4 Wb/m2 experiences a maximum couple of moment 4 x 10-5 N/m. What is its magnetic moment?

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0.4 A m2
0.2 A m2
0.16 A m2
0.04 A m2

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detailed solution

Correct option is A

τmaximum= MB⇒4 x10-5 =M x 10-4 ⇒M=0.4 Am2

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