Question

A coil of wire contains three loops. If the magnetic flux through the coil changes from −45 Wb to +52 Wb in 0.36 s, what is the magnitude of the emf induced in the coil

Answer 1

$\phi_1 = -45Wb$

$\phi_2 = 52Wb$

$t = 0.36s$

According to Faraday's law of magnetic induction:

$e = -N\dfrac{d \phi}{dt}$

$e = -3 \times \dfrac{52-(-45)}{0.36-0}$

$e = -3 \times 269.44$

$e = 808.33V$