Physics

Problem

The magnetic field perpendicular to a circular coil of

50

turns and radius

0.10\,\text{m}

varies with time as

B(t)=4t^{2}+2t

(in tesla,

t

in seconds). The emf induced in the coil at

t=2\,\text{s}

is closest to a)

31.4\,\text{V}

28\,\text{V}

25.1\,\text{V}

15.7\,\text{V}