JEE Main 2020 — Electromagnetic Induction Question with Solution
JEE Main 2020 (05 Sep Shift 2)
Question
An infinitely long straight wire carrying current I, one side opened rectangular loop and a conductor with a sliding connector are located in the same plane, as shown in the figure. The connector has length l. and resistance . It slides to the right with a velocity . The resistance of the conductor and the self inductance of the loop are negligible. The induced current in the loop, as a function of separation r, between the connector and the straight wire is
Choose an option
Show full solutionCorrect option: D
Step-by-step explanation
The induced current in the wire will be due to the motional EMF developed in the moving resistor and that back emf developed at that point will be equal to
velocity of the conductor
perpendicular magnetic field
length of conductor
We know magnetic field due to a long wire is
Hence the induced current across wire will be :
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This is a previous-year question from JEE Main 2020, covering the Electromagnetic Induction chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.