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Capacitors

Q1:
How long would it take the capacitor in the given circuit to completely charge if the switch was in position 1?

A 22 ms

B 69 ms

C 345 ms

D 440 ms

ANS:C - 345 ms

T= rc = (4.7 +2.2) *10 ^3 ohms * (10* 10^-6 Farad) = 69 mill sec But the time required for capacitor to fully charge is 5T. So 5*69 milli sec= 345 mSec.



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