JEE Main 2019 — Electromagnetic Induction Question with Solution
JEE Main 2019 (11 Jan Shift 2)
Question
A copper wire is wound on a wooden frame, whose shape is that of an equilateral triangle. If the linear dimension of each side of the frame is increased by a factor of keeping the number of turns of the coil per unit length of the frame the same, then the self inductance of the coil:
Choose an option
Show full solutionCorrect option: C
Correct answer
Cincreases by a factor of 3
Step-by-step explanation
As total length of the wire will remain constant
and length of winding
(d = diameter of wire) Now 'a' increased to ' ' So self inductance will become 3 times
(d = diameter of wire) Now 'a' increased to ' ' So self inductance will become 3 times
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This is a previous-year question from JEE Main 2019, 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.