Identify the correct expression for the magnitude of the emf induced between the ends…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Identify the correct expression for the magnitude of the emf induced between the ends of a straight conductor of length

\ell

moving with uniform speed

v

perpendicular to a uniform magnetic field of magnitude

B

. (a)

2B\ell v

(b)

B\ell v

(c)

-\!B\ell v

(d)

\dfrac{1}{2}B\ell v