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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
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- 20 seconds
- 5 seconds
- 1/5 seconds
- 40 seconds
Correct Option: B
Time constant is L/R
Given, L = 40H & R = 8Ω
∴ τ = 40/8 = 5 sec.
