A conducting circular loop is placed in a uniform magnetic field, 
with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mm 
. The induced emf when the radius is 2 cm, is
A
B
C
D
2 
Text Solution
Verified by ExpertsThe correct answer is:
B
Here, Magnetic field, 
Radius of the loop, 
cm 
Constant rate at which radius of the loop shrinks,
Magnetic flux linked with the loop is
The magnitude of the induced emf is
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