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NCERT Class XII Chapter
Electromagnetic Waves
Questions With Solutions

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Question : 7
Total: 15
The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B0 = 510 nT. What is the amplitude of the electric field part of the wave?
Solution:  
We know the relation,
E0
B0
 = c
E0 = B0c = 510 × 10−9 × 3 × 108
Peak value of electric field E0 = 1530 × 10–1 = 153 N C–1.
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