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JIPMER 2004
Exam
JIPMER
Year
2004
Subject
Physics
Chapter
Electromagnetic Induction

JIPMER 2004 · Physics · Electromagnetic Induction

If the current 3 A flowing in the primary coil is made zero in 0.1...

If the current 3 A flowing in the primary coil is made zero in 0.1 sec, the emf induced in the secondary coil is 1.5 volt. The mutual inductance between the coils is

Options

  1. A0.05 H
  2. B1.05 H
  3. C0.1 H
  4. D0.2 H

Correct answer

A. 0.05 H

Step-by-step solution

Here: e=1.5e=1.5 volt Δi=0−3=−3 A,Δt=0.1sec\Delta i=0-3=-3 \mathrm{~A}, \Delta t=0.1 \mathrm{sec} Now the emf induced in secondary coil e=MΔiΔte=\frac{M \Delta i}{\Delta t} \quad (numerically) or 1.5=M×30.1\quad 1.5=\frac{M \times 3}{0.1} or M=1.5×0.13=0.05H\quad M=\frac{1.5 \times 0.1}{3}=0.05 \mathrm{H}
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