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A coil of 40 henry inductance is connected in series with a resistance of 8 ohm 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



A coil of 40 henry inductance is connected in series with a resistance of 8 ohm 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


Grade:10

1 Answers

Simran Bhatia
348 Points
8 years ago

(b)

Time constant is L/R

Given, L = 40H & R = 8W

.''. t = 40/8 = 5 sec.

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