A conducting ring of radius r is placed perpendicularly inside a time varying magnetic field given by 
. B 0 and α are positive constants. Find the emf produced in the ring.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
The induced emf is given by
…(i)
and the magnetic flux is given as
(Here, θ is the angle between the magnetic field B and area vector of ring A)
…(ii)
From Eqs. (i) and (ii), we get
So, 
(given; 
)
But 
is the area of ring, here r is the radius of ring.
So, 
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