A rectangular coil ABCD which is rotated at a constant angular velocity about an horizontal as shown in the figure. The axis of rotation of the coil as well as the magnetic field B are horizontal. Maximum current will flow in the circuit when the plane of the coil is
to the magnetic field 
to the magnetic field Text Solution
Verified by ExpertsD
As, the coil is rotated, angle θ (angle which is normal to the coil makes with B at any instant t) changes, therefore magnetic flux 
linked with the coil changes and hence an emf is induced in the coil. At this instant t, if e is the emf induced in the coil, then
where, N is number of turns in the coil.
or 
or 
…(i)
The induced emf will be maximum, when 
is maximum.
= NSB 
1
e = 
Therefore, e would be maximum, hence current is maximum (as 
), when 
, i.e. normal of plane of coil is perpendicular to the field or plane of coil is parallel to magnetic field.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems