An Ac source of volatage V=100 sin `100pit` is connected to a resistor of ressistance 20` Omega`The rsm value of current through resistor is , power factor isA. 1B. 0C. `1/2`D. non of these

An Ac source of volatage V=100 sin `100pit` is connected to a resistor

1.	An Ac source of volatage V=100 sin `100pit` is connected to a resistor of ressistance 20` Omega`The rsm value of current through resistor is , power factor isA. 1B. 0C. `1/2`D. non of these
Answer» (a) `"cos " phi = (R)/(Z) = (R)/(sqrt(R+ (X_(L)-X_(C))^(2))) = (R)/(sqrt(R^(2)+ 0)) = 1` `rArr cos phi = 1`

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