The power factor of an AC circuit having resistance (R) and inductance (L) connected in series and an angular velocity `omega` is

Options

A. `R//omegaL`
B. `R//(R^(2)+omega^(2)L^(2))^(1//2)`
C. `omegaL//R`
D. `R//(R^(2)-omega^(2)L^(2))^(1//2)`

Answer

B

Explanation

`cos varphi=R/Z=R/((R^(2)+omegaL^(2))^(1//2))`