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Dipoles in a Field

How do we get work out of a magnetic field?

Single Charge Circulating in a Uniform Magnetic Field

No work done by magnetic field.

Concept Check

DEMONSTRATION: Current Loop in Magnetic Field

Force on Current Loop in a Magnetic Field

No net force on loop.

Torque on Current Loop in a Magnetic Field

Yes net torque on loop.

Torque on Electric Dipole in an Electric Field

[elec-dipole torque]

Magnetic Dipole Moment of a Current Loop

Torque on Magnetic Dipole in a Magnetic Field

[mag-dipole torque]

DEMONSTRATION: Galvanometer, dc Motor

Quiz 5: RC Circuits


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Last updated Oct. 22, 1997.
Copyright George Watson, Univ. of Delaware, 1997.