Free AP Physics C lesson

Force on Current-Carrying Wire

This AP Physics C: Electricity & Magnetism lesson is designed for AP Physics C self-study. It includes 3 video lessons, 5 practice questions, and an estimated completion time of 20 minutes.

Video lessons

  1. The Magnetic Force on a Current-Carrying Wire

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  2. Torque on a Current Loop in a Magnetic Field

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  3. The Magnetic Dipole Moment

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Practice covered

  1. The magnetic force on a straight wire of length L carrying current I in magnetic field vecB is:
  2. A 0.50 m wire carries 3.0 A perpendicular to a 0.40 T magnetic field. Calculate the magnetic force (in newtons) on the wire.
  3. A rectangular current loop with area A and current I in a uniform magnetic field vecB experiences maximum torque when:
  4. A circular loop with 50 turns, radius 0.10 m, and current 2.0 A is perpendicular to a 0.30 T field. Calculate the maximum torque (in N·m) as it rotates. (Use pi approx 3.14)
  5. The potential energy U of a magnetic dipole moment vecmu in a magnetic field vecB is:
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