JEE Main 2014 — Magnetic Effects of Current Question with Solution
JEE Main 2014 (12 Apr Online)
Question
Consider two thin identical conducting wires covered with very thin insulating material. One of the wires is bent into a loop and produces magnetic field , at its centre when a current passes through it. The ratio is:
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
For loop where, is the radius of loop.
Then,
Now, for coil at the centre radius of loop
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 2014, 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.