A rectangular coil A B C D is rotated anticlockwise with a unifor… - Vidyadip

MCQ

A rectangular coil $A B C D$ is rotated anticlockwise with a uniform angular velocity about the axis shown in diagram below. The axis of rotation of the coil as well as the magnetic field $B$ are horizontal. The induced e.m.f. in the coil would be maximum when

✓
The plane of the coil is horizontal
B
The plane of the coil makes an angle of $45^{\circ}$ with the magnetic field
C
The plane of the coil is at right angles to the magnetic field
D
The plane of the coil makes an angle of $30^{\circ}$ with the magnetic field

✓

Answer

Correct option: A.

The plane of the coil is horizontal

$\operatorname{Emf}=e=e_0 \sin \theta ; e$ will be maximum when $\theta$ is 90 i.e. plane of the coil will be horizontal.

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