JEE Main 2012 — Magnetic Effects of Current Question with Solution
JEE Main 2012 (12 May Online)
Question
The circuit in figure consists of wires at the top and bottom and identical springs as the left and right sides. The wire at the bottom has a mass of and is long. The wire is hanging as shown in the figure. The springs stretch under the weight of the wire and the circuit has a total resistance of . When the lower wire is subjected to a static magnetic field, the springs, stretch an additional . The magnetic field is
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This is a previous-year question from JEE Main 2012, covering the Magnetic Effects of Current 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.