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Course: Class 12 Physics (India) > Unit 2

Lesson 12: Energy stored in a capacitor
Science
Class 12 Physics (India)
Electrostatic potential and capacitance
Energy stored in a capacitor
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Energy stored in a capacitor (basic)

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Problem

A 20 μF capacitor is part of a dc circuit. A charge of 8 μC is detected on the capacitor when the power supply is turned on.
What is the energy, U, stored in the capacitor?
Note: Write the answer in units of micro-Joules.
U=
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
μJ