JEE Main 2026 — Electromagnetic Waves Question with Solution
JEE Main 2026 (22 January Shift 2)
Question
A laser beam has intensity of . The amplitude of magnetic field associated with beam is T.
(Take and )
(Take and )
Choose an option
Show full solutionCorrect option: B
Correct answer
B1.83
Step-by-step explanation
The intensity of an electromagnetic wave is
.
From the relation , we get .
Solving for magnetic field amplitude:
T.
.
From the relation , we get .
Solving for magnetic field amplitude:
T.
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Electromagnetic Waves 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 2026, covering the Electromagnetic Waves 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.