Free AP Physics C lesson

Ampère's Law

This AP Physics C: Electricity & Magnetism lesson is designed for AP Physics C self-study. It includes 4 video lessons, 6 practice questions, and an estimated completion time of 25 minutes.

Video lessons

  1. Ampère's Law

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  2. Using Ampère's Law to Calculate the Magnetic Field Due to a Wire

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  3. The Magnetic Field Inside a Long Straight Current-Carrying Wire

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  4. The Magnetic Field of a Solenoid

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Practice covered

  1. Ampère's Law states that:
  2. To use Ampère's Law for a long straight wire, you choose an Amperian loop that is:
  3. Inside a long straight wire of radius R with uniform current density, the magnetic field at distance r < R from the center:
  4. A wire of radius 2.0 mm carries 10 A uniformly distributed. Calculate the magnetic field (in tesla) at r = 1.0 mm from the center. (Use mu_0 = 4pi times 10^-7 T·m/A)
  5. The magnetic field inside a long ideal solenoid with n turns per unit length carrying current I is:
  6. A solenoid with 2000 turns over 0.50 m length carries 3.0 A. Calculate the magnetic field (in tesla) inside. (Use mu_0 = 4pi times 10^-7 T·m/A)
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