The power factor of a good choke coil is

Options

A. exactly zero
B. nearly one
C. exactly one
D. nearly zero

Answer

A

Explanation

As, `cos phi=(R )/(Z)`
In choke coil, which is not a pure inductance, `pi=(pi)/(2)`.There is some ohmic content in it.
`:. "cos"(pi)/(2)=` zero
`:.` Power factor = zero