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Find the time constant (in ) fo the give...

Find the time constant `(in ) fo the given RC circuits in the given order respectively
,

`(R_1)=1 Omega, (R_2)=2 Omega, C_(1)=4 muF, C_(2)=2 mu F`

A

`18,4,8/9`

B

`18,8/9,4`

C

`4,18,8/9`

D

`4,8/9,18

Text Solution

Verified by Experts

The correct Answer is:
B
Time constant of R-C circuit is `(tau)=(R_(eq))(C_(eq))`
(i) `(tau_1)=(2+1)(2+4)=18(mu)s`
(ii) `(tau_2)=((2xx1)/(2+1))((2xx4)/(2+4))=8/9 (mu s)`
(iii)`(tau_3)=((2xx1)/(2+1))xx(4+2)=4(mu s)`.
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