A series R-C combination is connected to an AC voltage of angular frequency ω = 500 radian/s. If the impedance of the R – C circuit is R1.25, the time constant (in millseconds) of the circuit is

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answer is 4.

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Detailed Solution

Z=R2+1ωc2⇒R1.25=R2+1500C2 by solving CR=4×10−3s⇒τ=CR=4 millisecond

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