1.

The magnetic field perpendicular to the plane of a conducting ring of radius r changes at the rate.(dB)/(dt) . Then

Answer»

the emf induced in the ring is `pi R^(2) (DB)/(dt)`
the emf induced in the ring is `2pi r (dB)/(dt)`
diametrically OPPOSITE points on the ring are at the same potential
all points on the ring are at the same potential

Answer :A::D


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