Alternating Current Frequency Flowing Circuit Containing Resistance And Choke Series

An alternating current of frequency ‘f’ is flowing in a circuit containing a resistance R and a choke L in series. … √[R2 + L2] …

Answers:

The correct option (b) √[R2 + 4π2f2L2]

 Explanation:

 Circuit is R – L series circuit, hence impedance

 z = √[R2 + ω2L2]

z = √[R2 + (2πf)2L2]

 z = √[R2 + 4π2f2L2