Question 61 of 151

A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B. At the position MNQ, the speed of the ring is V and the potential difference developed across the ring is 

(1) Zero

(2) $B\nu \pi R^2/2$ and M is at higher potential

(3) πRBV and Q is at higher potential

(4) 2RBV and Q is at higher potential