A thin semi-circular conducting ring (PQR) of radius r is falling with its plane vertical in a horizontal magnetic field B, as shown in the figure. The potential difference developed across the ring when its speed v, is- (NEET 2014)
A. Zero
B. \(\frac {{ Bvπr }^{2}}{ 2 }\)
C. πrBv and R is at higher potential
D. 2rBv and R is at higher potential
Answer:D
A thin semi-circular conducting ring (PQR) of radius r is falling with its plane vertical in a horizontal magnetic field B, as shown in the figure. The potential difference developed across the ring when its speed v, is- (NEET 2014)
A. Zero B. \(\frac {{ Bvπr }^{2}}{ 2 }\) C. πrBv and R is at higher potential D. 2rBv and R is at higher potential