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Find the time constant for the given RC circuits in correct order (in `mus`)
`R_(1)=1Omega,R_(2)=2Omega,C_(1)=4muF,C_(2)=2muF`
A. `18,4,8//9`
B. `18, 8//9,4`
C. `4,18, 8//9`
D. `4,8//9,18`

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Correct Answer - B
b. We know that time constant of an RC circuit is RC. Find
equivalent resistance and capacitance in each case and then
determine the time constant.

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