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NEET 2004 (AIPMT) · Inductors & DC Transients (Mixed)

Inductors & DC Transients (Mixed) question from NEET 2004 (AIPMT)

Q31NEET 2004 · AIPMTEasy

Inductors & DC Transients (Mixed)

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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Answer: (a)

Time constant of an L-R circuit $\tau = \frac{L}{R}$ (independent of the battery emf).
$\tau = \frac{40}{8} = 5\text{ s}$
So the answer is (a) 5 seconds.

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