Free AP Physics C lesson

Energy Storage

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 Energy Stored in a Capacitor

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  2. Energy Stored in a Capacitor, Work Done by Batteries

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  3. Energy Density of an Electric Field

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Practice covered

  1. The energy U stored in a capacitor with charge Q and voltage V is given by:
  2. A 100 μF capacitor is charged to 50 V. Calculate the energy stored (in joules).
  3. When a battery charges a capacitor, the work done by the battery W_b and energy stored in the capacitor U are related by:
  4. The energy density u (energy per unit volume) in an electric field E is:
  5. The electric field in a region has magnitude 1000 N/C. Calculate the energy density in μJ/m³ (microjoules per cubic meter). (Use epsilon_0 = 8.85 times 10^-12 C²/(N·m²))
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