Electro Magnetic Induction And Alternating Currents Question 182

Question: 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

Options:

A) 20 seconds

B) 5 seconds

C) 1/5 seconds

D) 40 seconds

Show Answer

Answer:

Correct Answer: B

Solution:

  • Time constant is L/R Given, L=40H & $ R=8\Omega $
    $ \therefore ,\tau =40/8=5,\sec $


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