JEE Main 2014 — Magnetic Effects of Current Question with Solution
JEE Main 2014 (12 Apr Online)
Question
A positive charge ' ' of mass ' ' is moving along the axis. We wish to apply a uniform magnetic field B for time so that the charge reverses its direction crossing the axis at a distance . Then:
Choose an option
Show full solutionCorrect option: C
Correct answer
C and
Step-by-step explanation
The applied magnetic field provides the required centripetal force to the charge particle, so it can move in circular path of radius
or,
Time interval for which a uniform magnetic field is applied
(particle reverses its direction after time by covering semi circle).
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.