1. Tardigrade
  2. Question
  3. Physics
  4. A coil of area 0.4 m2 has 100 turns. A magnetic field of 0.04 Wb m-2 is acting normal to the coil surface. If this magnetic field is reduced to zero in 0.01 s, then the induced emf in the coil is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A coil of area $0.4\, m^{2}$ has $100$ turns. A magnetic field of $0.04 \,Wb \,m^{-2}$ is acting normal to the coil surface. If this magnetic field is reduced to zero in $0.01\, s$, then the induced emf in the coil is

Electromagnetic Induction

Solution:

Here, $A=0.4\,m^{2}$,
$N=100$,
$dB=0.04\, Wb\, m^{-2}$,
$dt=0.01\,s$
As $\varepsilon=\frac{d \phi}{dt}$
$=NA \frac{dB}{dt}$
$=100 \times 0.4 \times \frac{0.04}{0.01}$
$=160\, V$