A permanent magnet has a magnetic dipole moment of 0.140 A. m4. The magnet is in the presence of an external uniform magnetic field (provided by current-carrying coils) with a magnitude of 0.0800 T, which makes an angle of 21.0° with the orientation of the permanent magnet. (a) What is the magnitude of the torque (in N- m) on the permanent magnet? N.m (b) What is the potential energy (in J) of the system consisting of the permanent magnet and the magnetic field provided by the coils?

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A permanent magnet has a magnetic dipole moment of 0.140 A · m². The magnet is in the presence of an external uniform magnetic field (provided by current-carrying coils) with a magnitude of 0.0800 T, which makes an
angle of 21.0° with the orientation of the permanent magnet.
• m
(a) What is the magnitude of the torque (in N• m) on the permanent magnet?
N• m
(b) What is the potential energy (in J) of the system consisting of the permanent magnet and the magnetic field provided by the coils?
Transcribed Image Text:A permanent magnet has a magnetic dipole moment of 0.140 A · m². The magnet is in the presence of an external uniform magnetic field (provided by current-carrying coils) with a magnitude of 0.0800 T, which makes an angle of 21.0° with the orientation of the permanent magnet. • m (a) What is the magnitude of the torque (in N• m) on the permanent magnet? N• m (b) What is the potential energy (in J) of the system consisting of the permanent magnet and the magnetic field provided by the coils?
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