A coil of 40 henry inductance is connected in series with a resistance of $8 \mathrm{ohm}$ and the…

A coil of 40 henry inductance is connected in series with a resistance of $8 \mathrm{ohm}$ and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is:
  1. 5 seconds
  2. 1/5 seconds
  3. 40 seconds
  4. 20 seconds

Solution

According to the question Time constant $L R$ circuit is $T=\frac{L}{P}$ $\therefore \quad T=5 \mathrm{sec}$

Asked in: NEET 2004

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