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Physics - EM Waves Question with Solution | TestHub

PhysicsEM WavesElectromagnetic wavesEasy2 minPYQ_2020
PhysicsEasysingle choice

If the magnetic field in a plane electromagnetic wave is given byB=3×10-8sin1.6×103x+48×1010tj^T,then what will be expression for electric field ?

Options:

Answer:
B
Solution:

E0B0=C (speed of light in vacuum)
E0=B0C=3×10-8×3×108
=9NC
So,

 E=9sinωt+kx+ϕ

E=9sin1.6×103x+48×1010tk ^Vm

Stream:JEESubject:PhysicsTopic:EM WavesSubtopic:Electromagnetic waves
2mℹ️ Source: PYQ_2020

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