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ADVANCING PHYSICS
CAPACITANCE
How much charge a capacitor can keep separated at a given Potential Difference.
The amount of charge stored per volt
Q
C=V
C = Capacitance, Q = Charge, V = Potential Difference

Capacitance is measured in Farads or F
The simplest form of capacitor consists of two…

Page 2

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E= 1
2 QV
E = Energy on a capacitor, Q = Charge, V = potential difference





2
E=1
2 CV

E = Energy on a capacitor, C = Capacitance, V = potential difference

When the capacitor is connected around a resistor, the current flows in the opposite direction from…

Page 3

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-t
Q = Q0 eRC

Q = Charge left on plates, Q0 = charge of capacitor when fully charged, t = Time, RC = time constant

The graphs for potential difference or current against time for charging and discharging are also




exponential.
t
dV = Gradient of V 0e-RC
dt…

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