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Friday, 9 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 24 June 2022, Shift 1, Physics Q43

Question 43 of 90 in this shift, Physics question 13 of 30, Section A.

A plane electromagnetic wave travels in a medium of relative permeability 1.61 and relative permittivity 6.44. If magnitude of magnetic intensity is 4.5×10−2 Am−14.5\times10^{-2}\ \mathrm{Am^{-1}} at a point, what will be the approximate magnitude of electric field intensity at that point ? (Given : Permeability of free space μ0=4π×10−7 NA−2\mu_0=4\pi\times10^{-7}\ \mathrm{NA^{-2}}, speed of light in vacuum c=3×108 ms−1c=3\times10^{8}\ \mathrm{ms^{-1}})
  1. (1)16.96 Vm−116.96\ \mathrm{Vm^{-1}}
  2. (2)2.25×10−2 Vm−12.25\times10^{-2}\ \mathrm{Vm^{-1}}
  3. (3)8.48 Vm−18.48\ \mathrm{Vm^{-1}}Official answer
  4. (4)6.75×106 Vm−16.75\times10^{6}\ \mathrm{Vm^{-1}}

Official answer

Option 3

NTA final key (2022 Session 1).

Chapter
Electromagnetic Waves
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.