Question

What is the Q factor of a LR circuit?

• A. $\frac{1}{R}$
• B. $\frac{X_L}{R}$
• C. $1$
• D. $0$

Answer 1

The correct option is B $\frac{X_L}{R}$

The quality factor or Q factor of an LR circuit at the operating frequency $\omega$ is defined as the ratio of reactance $\nu F$ the coil to the resistance.

i.e. $Q=\frac{\omega L}{R}=\frac{X_L}{R}$