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PRACTICE / LC oscillations

The capacitor starts with only part of the energy

Immediately after switching, an isolated ideal LC loop has L = 0.50 H, C = 8.0 μF, capacitor voltage +3.0 V and current +0.016 A in the direction charging its positive plate.

What is the greatest capacitor voltage magnitude reached subsequently?

Organize the givens & assumptions
  • L = 0.50 H
  • C = 8.0 μF
  • Initial capacitor voltage: 3.0 V
  • Initial charging current: 0.016 A

Lossless fixed L and C, lumped circuit, no source after switching. Initial current and capacitor voltage are both part of the specified starting state.

  1. A3.0 V3.0\ \mathrm V
  2. B4.0 V4.0\ \mathrm V
  3. C7.0 V7.0\ \mathrm V
  4. D5.0 V5.0\ \mathrm V

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