JEE Main 2019 — Magnetic Effects of Current Question with Solution
JEE Main 2019 (10 Apr Shift 1)
Question
A proton, an electron, and a Helium nucleus, have the same energy. They are in circular orbits in a plane due to magnetic field perpendicular to the plane. Let and be their respective radii, then,
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
We know,
K.E. is same for all particle and magnetic field B is also some.
For proton:
For electron:
For Helium nuclei:
K.E. is same for all particle and magnetic field B is also some.
For proton:
For electron:
For Helium nuclei:
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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.