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A vertical conduction ring of radius R f...

A vertical conduction ring of radius `R` falls vertically in a horizontal magnetic field of magnitude `B` with constant speed `v` . The direction of `B` is perpendicular to the plane of the ring. When the speed of the ring is `v` , (i) `A` and `D` are at different potential
(ii) `A` and `D` are at the same potential
(iii) `C` and `E` are at the same potential
(iv) The potential difference between `A` and `D` is `2BRv` , with `D` a higher potential

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