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.A magnet of magnetic moment 4.0"A-m^(2)...

.A magnet of magnetic moment 4.0"A-m^(2) is held in a uniform magnetic field of induction 5.0times10^(-4)T with the magnetic moment vector making an angle 30∘ with the field.The work done in increasing the angle from "30∘ to "45∘ is about

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