1 Electromagnetic Induction
Two conducting rings of radii r and 2r move in opposite directions with velocities 2v and v respectively on a conducting surface S. There is a uniform magnetic field of magnitude Bperpendicular to the plane of the rings. The potential difference between the highest points of the two rings is 1) zero 2) 2rvB 3) 4rvB 4) 8rvB
Replace the induced emf in the rings by cells. ε1=B2r(2v)=4Brv. ε2=B(4r)v=4Brv V2−V1=ε2+ε1=8Brv
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