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Q.

In the given circuit initially the capacitor is uncharged. At t=0 the key is closed. Choose the correct options (s)
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a

The time constant of the circuit is .11RC4

b

The time constant of the circuit is  .11RC5

c

current through the capacitor after one time constant is  3E11R(1e)

d

current through the capacitor after one time constant is  5E11R(1e)

answer is A, C.

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Detailed Solution

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Equivalent resistance across capacitor (after shorting the battery) =11R4 .
Voltage across capacitor in steady state=3E4  
q=CE4(1e4t11RC)
 

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