Published by:
CGP EDU Academic Team
Published on: September 12, 2026
In fig, CODF is a semicircular loop of a conducting wire of resistance R and radius r. It is placed in a uniform magnetic field B, which is directed into the page (perpendicular to the plane of the loop).
The loop is rotated with a constant angular speed ω about an axis passing through the centre O, and perpendicular to the page. Then the induced current in the wire loop is
A
zero
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
The area swept by radius OC in one half circle is 
. The flux change in time 
is thus ( 
). The induced emf is then 
The induced current is then 
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
A uniform magnetic field exists in a direction perpendicular to the plane of a square loop made of…
A small bar magnet is moved through a coil at constant speed from one end to the other. Which of th…
An infinitely long, straight wire carrying current I, one side opened rectangular loop and a conduc…
A long solenoid of radius carries a time dependent current . A ring of radius is placed coaxiall…
At time magnetic field of Gauss is passing perpendicularly through the area defined by the closed…
Magnetic flux (in weber) in a closed circuit of resistance 20 varies with time t(s) as = 8t 2 - 9…