JEE Main 2019 — Magnetic Effects of Current Question with Solution
JEE Main 2019 (09 Jan Shift 2)
Question
One of the two identical conducting wires of length is bent in the form of a circular loop and the other one into a circular coil of identical turns. If the same current is passed in both, the ratio of the magnetic field at the centre of the loop to that at the centre of the coil i.e. will be
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
For a single loop, radius
...(1)
For a circular coil, radius
...(2)
(from eqns (1) and (2))
...(1)
For a circular coil, radius
...(2)
(from eqns (1) and (2))
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Magnetic Effects of Current chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2019, 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.