Physics

Problem

0.40\,\text{m}

long rod is moved in a uniform magnetic field of

0.50\,\text{T}

such that its velocity is always perpendicular to the field. If the speed of the rod varies with time as

v(t)=2t\,\text{m s}^{-1}

(with

t

in seconds), what is the emf induced at

t=4\,\text{s}

? a)

4.00\,\text{V}

1.60\,\text{V}

0.40\,\text{V}

0.80\,\text{V}