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Physics
Physics
Problem
A straight metallic rod of length
L
L
L
is pulled with constant speed
v
v
v
making an angle
θ
\theta
θ
with a uniform magnetic field
B
B
B
. Which of the following gives the magnitude of the induced emf between its ends? a)
B
L
v
cos
θ
BLv\cos\theta
B
Lv
cos
θ
b)
B
L
v
BLv
B
Lv
c)
B
L
v
sin
θ
BLv\sin\theta
B
Lv
sin
θ
d)
B
L
v
sin
2
θ
BLv\sin^{2}\theta
B
Lv
sin
2
θ
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