JEE Main 2020PhysicsElectromagnetic WavesMediumMCQ

JEE Main 2020Electromagnetic Waves Question with Solution

JEE Main 2020 (02 Sep Shift 2)

Question

In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by k^ and  2i^-2j^,  respectively. What is the unit vector along direction of propagation of the wave.

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Show full solutionCorrect option: A
Correct answer
A12(i^+j^)

Step-by-step explanation

E×BC
E^×B^=12i^j^k^0011-10=i^+j^2c^=i^+j^2

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About this question

This is a previous-year question from JEE Main 2020, 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.