for a capacitive two-terminal element with terminals A and B, quotient of the electric charge q at A by the voltage (131-11-56) uAB between the terminals where the sign of the electric charge is determined by taking the electric current in the time integral defining this charge as positive if its direction is from A to B and negative if its direction is from B to A Note 1 to entry: A capacitance cannot be negative. Note 2 to entry: The coherent SI unit of capacitance is farad, F.
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