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Question
Solve the numerical problem.
The amplitude of the magnetic field part of a harmonic EM wave in a vacuum is B0 = 5 × 10−7 T. What is the amplitude of the electric field part of the wave?
Sum
Solution
Given: B0 = 5 × 10–7 T, c = 3 × 108
To find: Amplitude of electric field (E0)
Formula: c = `"E"_0/"B"_0`
Calculation: From formula,
E0 = c × B0
= 3 × 108 × 5 × 10−7
= 150 V/m
The amplitude of the electric field is 150 V/m.
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Chapter 13: Electromagnetic Waves and Communication System - Exercises [Page 241]
