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How many time constants does it take to fully charge a capacitor?
Wiki User
∙ 11y ago
If a resistor is connected in series with the capacitor forming an RC circuit, the capacitor will charge up gradually through the resistor until the voltage across the capacitor reaches that of the supply voltage. The time called the transient response, required for this to occur is equivalent to about
5 time constantsor
5T
. This transient response time
T
, is measured in terms of
τ= R x C
, in seconds, where
R
is the value of the resistor in ohms and
C
is the value of the capacitor in Farads. This then forms the basis of an RC charging circuit were
5T
can also be thought of as
"5 x RC"
.
Wiki User
∙ 11y ago
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