Choose the correct options for the following questions.
A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:
Difficulty: Easy
A:
The coil is disorted
B:
The coil is rotated
C:
The coil is neither disorted nor rotated
D:
Both a and b
In order that no emf should be induced in a flat loop of wire placed in changing magnetic field, the angle between $\overrightarrow{B}$ and $\triangle \overrightarrow{A}$ should be:
Difficulty: Easy
A:
$0^{\circ}$
B:
$45^{\circ}$
C:
$90^{\circ}$
D:
$135^{\circ}$
The unit of induced emf is:
Difficulty: Easy
A:
Volt
B:
Nm/As
C:
$Joule\:coul^{-1}$
D:
All
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