A coil of inductance 40 henry 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

40 seconds

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20 seconds

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8 seconds

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5 seconds

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Solution

The correct option is D 5 seconds
$τ = \frac{L}{R} = \frac{40}{8} = 5 s e c$

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A coil of inductance 40 henry 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

The correct option is D 5 secondsτ=LR=408=5 sec

The correct option is D 5 seconds
$τ = \frac{L}{R} = \frac{40}{8} = 5 s e c$