Question

The power factor of a good choke coil is

• A. Nearly zero
• B. Exactly zero
• C. Nearly one
• D. Exactly one

Answer 1

Answer: (A)

Nearly zero

Answer 2

$\cos \phi = \frac { R } { Z }$ . In choke coil $\phi \approx 90 ^ { \circ }$so $\cos \phi \approx 0$