Energy stored in a capacitor

Change the capacitance and the voltage to see the charge stored and the energy, which grows with voltage squared.

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Questions students ask

What is a farad?

A capacitor of one farad stores one coulomb of charge for every volt across it. Most are measured in micro- or nanofarads.

What formula does it use?

Q = CV; E = ½CV² = ½QV.

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