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Automatic Control Systems - Engineering

Q1:

In the given figure, the input frequency is such that R = XC. Then

A v0 lags vi by 45°

B v0 lags vi by 90°

C v0 leads vi by 45°

D v0 leads vi by 90°

ANS:A - v0 lags vi by 45°

R = XC, voltage drops across R and XC are equal and at 90° with respect by each other. V0 lags Vi by 45°.