Physics

Problem

A generator uses a 200-turn circular coil of radius

5.0\,\text{cm}

that rotates at a constant angular speed of

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

in a uniform magnetic field of

0.25\,\text{T}

. The coil’s plane is perpendicular to the field at

t = 0

. What is the magnitude of the induced emf at

t = 0.025\,\text{s}

? a)

0\;\text{V}

17\;\text{V}

23\;\text{V}

1.7\;\text{V}