Question

A coil and a magnet moves with their constant speed 5 m/sec. and 3 m/sec. respectively, towards each other, then induced emf in coil is 16 mV. If both are moves in same direction, then induced emf in coil:-
(1) 15 mV (2) 4 mV (3) 64 mV (4) Zero

Answer 1

Dear Student,
$$\begin{gathered} firstsituation \\ v=5m/s,v\text{'}=3m/s \\ relativespeed=8m/s \\ theinducedemfisdirectlyproportionaltorelativevelocity. \\ insecondcase \\ relativespeed=5-3=2m/s \\ letthemefinducedise \\ \frac{e}{16}=\frac{2}{8} \\ e=4mV \\ option2 \\ Regards \end{gathered}$$