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Grade 10IIT JEE Entrance Exam

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

Profile image of Navjyot Kalra
12 Years agoGrade 10
Answers icon

1 Answer

Profile image of Simran Bhatia
12 Years ago

(b)

Time constant is L/R

Given, L = 40H & R = 8W

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

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