Charge, voltage, and capacitance for a capacitor (17-14)

Question 1 of 3

Question

The magnitude of $q$ is directly proportional to $V$ , the voltage (potential difference)

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Question

The constant of proportionality between charge $q$ and voltage $V$ is the capacitance $C$ of the capacitor.

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Question

A capacitor carries a charge $+q$ on its positive plate and a charge $−q$ on its negative plate.

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Review

For a parallel-plate capacitor, $C$ depends only on the area $A$ of the plates, the distance $d$ between them, and the material between them. We’ve assumed that the plates are separated by vacuum; in Section 17-8 we’ll explore what happens if the space between the capacitor plates is filled with a different material. Capacitance is therefore a compact way to summarize the electrical properties of a capacitor. In particular, capacitance tells us the amount of charge that can be stored on a capacitor held at a given voltage.