A compass needle has a magnetic dipole moment of ||=0.75Am2. It is immersed in a uniform magnetic

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Question:

A compass needle has a magnetic dipole moment of |μ→|=0.75A⋅m2. It is immersed in a uniform magnetic field of |B→|= 3.00⋅10^−5T. How much work is required to rotate this compass needle from aligned with the magnetic field to pointing opposite the magnetic field?