1) A coil of 40 henry inductance is connected in series with a resistance of 8 ohms and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is A) 20 Seconds B) 5 Seconds C) 1/5 Seconds D) 40 Seconds Answer: Option BExplanation:Time constant is L/R Given, L = 40H & R = 8 Ω .'. $\tau$ = 40/8 = 5 Sec
