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The time constant of C-R circuit is...

The time constant of C-R circuit is

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Time constant of R-L circuit tells us how fast of how slow is the `growth//decay` of current in te R-L circuit. Low value of time constant indicates that the growth and decay are fast. Large values of time cosntant indicate that growth and decay of time constant indicate the growth and decay of current in the circuit are slow.
For a given circuit, time constant is fixed. Its value can be optimised by selecting suitable value of R and L.
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