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Alternating Current question

2004 · Q127
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Alternating Current question

2004 · Q127

NEETPhysicsAlternating CurrentMCQ+4 / −1
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
  1. A
    5 seconds
  2. B
    1/5 seconds
  3. C
    40 seconds
  4. D
    20 seconds
View written solutionFree

Correct answer: A

Time constant of LR circuit is τ\tau τ = L/R.

∴\therefore∴ τ\tau τ = 40/8 = 5 sec.

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