A current of $4 \mathrm{~A}$ flows in a coil when connected to a $12 \mathrm{~V}$ d.c. source. If the same…

A current of $4 \mathrm{~A}$ flows in a coil when connected to a $12 \mathrm{~V}$ d.c. source. If the same coil is connected to a $12 \mathrm{~V},\left(\frac{25}{\pi}\right) \mathrm{Hz}$ a.c source, a current of $2.4 \mathrm{~A}$ flows in the circuit. The inductance of the coil is
  1. $\begin{aligned} & 100 \mathrm{mH}\end{aligned}$
  2. $\begin{aligned} & 80 \mathrm{mH} \end{aligned}$
  3. $\begin{aligned} & 60 \mathrm{mH} \end{aligned}$
  4. $\begin{aligned} & 50 \mathrm{mH}\end{aligned}$

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (26 Apr Shift 2)

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