A thin semicircular conducting ring of the radius 
is falling with its plane vertical in a horizontal magnetic induction 
. At the position MNQ, the speed of the ring is 
and the potential difference developed across the ring is
A
Zero
B
and 
is at a higher potential
C
and 
is at a higher potential D
and 
is at a higher potential
Text Solution
Verified by ExpertsThe correct answer is:
D
Induced motional emf in MNQ is equivalent to the motional emf in an imaginary wire MQ i . e.,
Therefore, the potential difference developed across the ring is 
with Q at a higher potential.
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