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Two metallic rings A and B, identical in shape and sign but having different resistivities ρA and ρB, are kept on top of two identical solenoids as shown in Fig. 9.79. When current I is switched on both the solenoids in identical manner, the rings A and B jumps to height hA>hB. The possible relation (s) between their resistances and their mass is (are)

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Important Questions on Electromagnetic Induction

MEDIUM
12th West Bengal Board
IMPORTANT
Find correct statement for, A current carrying infinitely long wire is kept along the diameter of a circular wire loop, without touching it.
MEDIUM
12th West Bengal Board
IMPORTANT
A metal rod is moved with a uniform velocity in a magnetic field. A potential difference is developed across the two ends of the rod if
MEDIUM
12th West Bengal Board
IMPORTANT
A circular loop of wire is placed in a uniform magnetic field perpendicular to the plane of loop. An emf is induced in the loop if