Questions
The magnetic field in a plane electromagnetic wave is given by . Write an expression for the electric field
detailed solution
Correct option is B
Step no 1: Eo=CBo=3×108×2×10−7=60V/mStep no 2:In electromagnetic wave, the electric field is varying sinusoidally with x and ‘t’ perpendicular to the direction of magnetic field as well as the direction of electro magnetic wave. So electric field is varying along Z- directionStep 3: Thus Ez=Eosin(2πλx+2πλt)Ez=60sin(0.1×103x+1.1×1011t)V/mTalk to our academic expert!
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The transmitting antenna of a radio-station is mounted vertically. At a point 10 km due north of the transmitter the peak electric field is 10-3 V/m. The amplitude of the radiated magnetic field is
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