A conductor of length moves perpendicular to a uniform magnetic field of with a speed…

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A conductor of length

0.40\,\text{m}

moves perpendicular to a uniform magnetic field of

0.25\,\text{T}

with a speed that varies with time as

v = 2t

m\,s

^{-1}

, where

t

is in seconds. Determine the induced emf at

t = 4\,\text{s}