Question

A constant magnetic field of 0.50 T is applied to a rectangular loop of area 3.0 × 10-3 m2. If the area of this loop changes from its original value to a new value of 1.6 × 10-3 m2 in 1.6 s, what is the emf induced in the loop?

Answer 1

Answer:

e= 0.440 mV(millivolt)

Explanation:

Given Magnetic field B= 0.50T

$A_{1}=3\times10^{-3}$

$A_{2}=1.6\times10^{-3}$

Δt= 1.6sec

$induced emf e=\frac{\mathrm{d} \phi }{\mathrm{d} t}$

⇒$e=B\frac{\mathrm{d} A}{\mathrm{d} t}$

$e=0.50\times\frac{3\times10^{-3}-1.6\times10^{-3}}{1.6}$

$e=0.440\times10^{-3} volt$

e= 0.440 mV(millivolt)