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

Question 1 of 3

Question

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

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Question

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

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Question

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

{"title":"A capacitor carries a charge +q on its positive plate and a charge −q on its negative plate.","description":"Correct!","type":"correct","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"10,16,12,16\"},{\"shape\":\"poly\",\"coords\":\"144,22\"},{\"shape\":\"rect\",\"coords\":\"1,21,36,66\"}]"} {"title":"The magnitude of q is directly proportional to V, the voltage (potential difference) between the plates.","description":"Wrong","type":"incorrect","color":"#ffcc00","code":"[{\"shape\":\"rect\",\"coords\":\"145,6,182,54\"}]"} {"title":"The constant of proportionality between charge q and voltage V is the capacitance C of the capacitor.","description":"Incorrect","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"98,6,141,52\"}]"}

Review

Let’s apply Kirchhoff's loop rule to the circuit shown in Figure 18-17b. In Section 17-5 we found that the magnitude of the charge $q$ on the capacitor plates is proportional to the voltage $V$ across the capacitor: