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Energy of a magnetic dipole in a magnetic field

Energy of a magnetic dipole in a magnetic field. You don’t realize it yet, but we have been talking about magnetic dipoles for the last 5 slides. A current loop, or any other body that experiences a magnetic torque as given above, is called a magnetic dipole. Energy of a magnetic dipole?.

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Energy of a magnetic dipole in a magnetic field

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  1. Energy of a magnetic dipole in a magnetic field You don’t realize it yet, but we have been talking about magnetic dipoles for the last 5 slides. A current loop, or any other body that experiences a magnetic torque as given above, is called a magnetic dipole. Energy of a magnetic dipole? You already know this: Today: Electric Dipole Magnetic Dipole Homework Hint Homework Hint

  2. Example: a magnetic dipole of moment is in a uniform magnetic field . Under what conditions is the dipole’s potential energy zero? Minimum? Under what conditions is the magnitude of the torque on the dipole minimum? Maximum?

  3. Example: a magnetic dipole of moment is in a uniform magnetic field . Under what conditions is the dipole’s potential energy zero? Minimum? Under what conditions is the magnitude of the torque on the dipole minimum? Maximum? IR  IR IL     = 90 B B   IL A A Potential energy is zero when cos  = 0, or when  = 90 or 270.

  4. Example: a magnetic dipole of moment is in a uniform magnetic field . Under what conditions is the dipole’s potential energy zero? Minimum? Under what conditions is the magnitude of the torque on the dipole minimum? Maximum?  IR IR   B  A B  = 0  IL A  IL Potential energy is minimum when cos  = 1, or when  = 0 or 180.

  5. Example: a magnetic dipole of moment is in a uniform magnetic field . Under what conditions is the dipole’s potential energy zero? Minimum?Under what conditions is the magnitude of the torque on the dipole minimum? Maximum?  IR IR   B  A B  = 0  IL A  IL Torque magnitude is minimum when sin  = 0, or when  = 0 or 180.

  6. Example: a magnetic dipole of moment is in a uniform magnetic field . Under what conditions is the dipole’s potential energy zero? Minimum? Under what conditions is the magnitude of the torque on the dipole minimum? Maximum? IR  IR IL     = 90 B B   IL A A Torque magnitude is maximum when sin  = 1, or when  = 90 or 270.

  7. Example: a magnetic dipole of moment is in a uniform magnetic field . Under what conditions is the dipole’s potential energy maximum? IR   B   IL A I left this for you to figure out.

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