Topic: Network Theory
Time constant of a series R-L circuit equals
- A. L/R second
- B. LR second
- C. $L^{2}R$
- D. $LR^{2}$
Answer: A. L/R second
Explanation: The time constant ($\tau$) for a series R-L circuit is defined as the ratio of inductance to resistance, $\tau = \frac{L}{R}$ seconds.