How to find the charge time of a capacitor in series with a resistor?

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rocko75

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how do find the charge time of a capacitor in series with a resistor? Question for school
 

Re: capacitor charging

CxR=T
C= capacitance in Farads
R= resistance in ohms
T= time in seconds
In t time the voltage across the capacitor wil be .6v
 

capacitor charging

it charging duration depends on its time constant RC ..Usually five times RC sec...
 

Re: capacitor charging

Vc = Vf-(vf-Vi)*e^(-t/(R*C))


Vf= vfinal
Vi=Vinitial
 

Re: capacitor charging

rocko75,
Assuming that the capacitor is initially dischharged, the following equation works:
Let Vin = the input voltage to the resistor
Vout = the capacitor voltage at the time of interest
Then
t = -ln[(Vin - Vout)/Vin]
Regards,
Kral
 

Re: capacitor charging

Fine thank's
 

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