Physics

Problem

A coil of 50 turns and area

0.010\,\text{m}^2

rotates with angular speed

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

in a uniform magnetic field of

0.10\,\text{T}

. At

t=0

, the plane of the coil makes an angle of

30^{\circ}

with the magnetic field. What is the instantaneous emf in the coil at

t=2.0\,\text{ms}

? a)

2.1\,\text{V}

4.2\,\text{V}

5.0\,\text{V}

6.0\,\text{V}