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Questions  

In the network shown, time constant of the circuit is ς when switches S1 and S2 are open. When S1 and S2 are closed, time constant of the circuit will be 

a
4ς3
b
2ς3
c
3ς2
d
3ς4

detailed solution

Correct option is A

ς=LRwhen S1 and S2 are closed, Re=R×RR+R=R2 and Le=2L×L2L+L=2L3∴ς1=2L/3R/2=43ς

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