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Physics
Problem
Which expression gives the magnitude of the emf induced between the ends of a straight conducting rod of length
l
l
l
when it moves with speed
v
v
v
perpendicular to a uniform magnetic field of magnitude
B
B
B
? a)
2
B
l
v
2 B l v
2
B
l
v
b)
1
2
B
l
v
\dfrac{1}{2} B l v
2
1
B
l
v
c)
B
l
v
B l v
B
l
v
d)
2
B
l
v
\sqrt{2}\, B l v
2
B
l
v
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