1.

Find the time constant (in mu s) for the given RC circuits in the given order respectively. R_(1) = 1 omega, R_(2) = 2 omega, C_(1) = 4muF, C_(2) = 2mu F

Answer»

`18, 4, (8)/(9)`
`18, (8)/(9), 4`
`4, 18, (8)/(9)`
`4, (8)/(9), 18`

SOLUTION :Time constant of R - C circuit is `tau = R_(eq)C_(eq)`
(i) `tau_(1) = (2 + 1)(2 + 4) = 18 mus`
(ii) `tau_(2) = ((2xx 1)/(2 + 1)) ((2 XX 4)/(2 + 4)) = (8)/(9)mus`
(iii) `tau_(3) = ((2 xx 1)/(2 + 1)) xx (4 + 2) = 4 MU s`


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