# What is a non-linear capacitor?

I'm new here. I have a (maybe dumb) question: What are non-linear capacitors? I'm given a circuit including a capacitor and the question says

The given capacitor is non-linear with the characteristic equation $g=v^3$.

But I don't know what this equation means.

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You'll have to find out what the definition of g and v are in your particular textbook. Typically "nonlinear" means the capacitance $C$ varies with voltage, or frequency, etc. –  Carl Witthoft Apr 1 '14 at 11:49