1. Tardigrade
  2. Question
  3. Physics
  4. A magnetic field of 2× 10-2T acts at right angles to a coil of area 100 cm2, with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from the field in t sec. The value of t is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A magnetic field of $2\times 10^{-2}$T acts at right angles to a coil of area 100 $cm^2$, with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from the field in t sec. The value of t is

AIPMTAIPMT 1991

Solution:

$\in=\frac{-(\phi_2-\phi_1)}{t}=\frac{-(0-NBA)}{t}=\frac{NBA}{t}$
$t=\frac{NBA}{\in}=\frac{50\times2\times10^{-2}\times10^{-2}}{0.1}=0.1 \, s$