A 50 μ(micro) Farad capacitor is fed with a current of 25 milliAmpere. How long will it take to charge it to 100Volts?
- 1 second.
- 2 seconds.
- 12 minutes.
vilkas90 asking:
How to find it?
Community Comments (1)
D
dimky Posts: 511 27.11.2016 / 14:31
Work out the resistance in the circuit first: R=V/I=100/0.025=4000 ohms
Then work out the time constant: TC=R*C=4000*0.00005=0.2
Time to charge = 5RC = 5 * 0.2 = 1
Then work out the time constant: TC=R*C=4000*0.00005=0.2
Time to charge = 5RC = 5 * 0.2 = 1
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