Physics

Problem

A rigid rectangular loop of area

0.10\,\text{m}^2

makes an angle

30^{\circ}

with a uniform magnetic field of

0.40\,\text T

. The loop rotates so that

\theta

increases at

5\,\text{rad}\,\text s^{-1}

and the magnetic field simultaneously decreases at

0.020\,\text T\,\text s^{-1}

. Calculate the magnitude of the induced emf at that instant. a)

98\,\text{mV}

2.0\,\text{mV}

0.10\,\text{V}

18\,\text{mV}