Mathematics · Electrostatics and Capacitance
A parallel plate capacitor with capacitance C = 14 pF is charged by a battery to a potential difference V = 12 V. The battery is then disconnected. A porcelain slab with a dielectric constant K = 7 is inserted into the gap. Assuming frictionless motion and that the slab fits tightly between the plates, what is the maximum kinetic energy (in pJ) that the slab can achieve as it oscillates back and forth?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11008 pJ
- 2864 pJ
- 3720 pJ
- 486.4 pJ✓
Correct answer
86.4 pJ
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