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62. (a) The potential difference
V
across the plates of a capacitor is related to the charge
q
on the positive plate by
V = q
/
C
, where
C
is capacitance. Since the charge on a
discharging capacitor is given by
q = q
0
e
–t
/
τ
, this means
V = V
0
e
–t
/
where
V
0
is the initial
potential difference. We solve for the time constant
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Capacitance, Charge

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