Physics

Problem

A circular wire loop has its radius increasing uniformly at

1.0\,\text{mm\,s}^{-1}

. The loop is in a uniform magnetic field of

0.50\,\text{T}

directed perpendicular to its plane. If the radius of the loop is

10.0\,\text{cm}

t = 0

, the magnitude of the induced emf in the loop at

t = 2.0\,\text{s}

is closest to a)

6.4\times 10^{-4}\,\text{V}

3.2\times 10^{-5}\,\text{V}

3.2\times 10^{-4}\,\text{V}

1.6\times 10^{-4}\,\text{V}