Two metallic rings A and B , identical in shape and size but having different…
Physics · JEE Advanced · NTA Exams — Electromagnetic Induction and Alternating Currents
Two metallic rings A and B, identical in shape and size but having different resistivities ρA and ρB, are kept on top of two identical solenoids as shown in the figure. When current I is switched on in both the solenoids in identical manner, the rings A and B jump to heights hA and hB,respectively, with hA > hB. The possible relation(s) between their resistivities and their masses mA and mB is(are).
- rA > rB and mA = mB
- rA < rB and mA = mB
- rA > rB and mA > mB
- rA < rB and mA < mB
Answer
(B) r A r B and m A = m B
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