Topic: Circuit Analysis
Q factor of a coil is given by
- A. $X_{L}/R$
- B. $R/X_{L}$
- C. $X_{L}/(R^{2})$
- D. $X_{C}/X_{L}$
Answer: A. $X_{L}/R$
Explanation: The Quality factor (Q factor) of an inductive coil is defined as the ratio of its inductive reactance ($X_L = \omega L$) to its effective resistance ($R$) at a given frequency. Thus, $Q = \frac{X_L}{R}$.