A) Zero
B) 2BvR
C) 4BvR
D) None of these
Correct Answer: C
Solution :
[c] Considering a projected length 2R on the ring in vertical plane. This length will move at a speed v perpendicular to the field. This results in an induced emf: e=Bv (2R) in the ring In Ring \[''A'':eA=BV\left( 2R \right)\] In Ring \[''B'':cb=B\left( V \right)\left( 2R \right)\] \[\therefore \] potential difference between upper points \[=BV\left( 2R \right)+BV\left( 2R \right)=4BVR\]You need to login to perform this action.
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