Choose the correct options for the following questions.
Motional emf is called motional:
Difficulty: Easy
A:
Electromagnetic force and measured in newtons
B:
Electromotive force and is measured in volt
C:
Electromotive force and measured in newtons
D:
Electromagnetic force and measured in volts
A metal rod of length 1 m is moving at a speed of $1 ms^{-1}$ in a direction making an angle of $30^{\circ}$ with 0.5 T magnetic field. The emf produced in the rod is:
Difficulty: Easy
A:
0.25 N
B:
-.25 V
C:
2.5 V
D:
2.5 N
The magnitude of motional emf is calculated by:
Difficulty: Easy
A:
$\epsilon=-vBL \sin \theta$
B:
$\epsilon=-vBL \cos \theta$
C:
$\epsilon=+vBL \sin \theta$
D:
None
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