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28/12/2021 4:36 pm
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An electromagnetic wave is given by E = sin(50 x + 1010t)V/m. Find speed in terms of C.
(a) \(\frac{2}{3}\)C
(b) \(\frac{1}{2}\)C
(c) \(\frac{1}{4}\)C
(d) \(\frac{3}{4}\)C
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28/12/2021 4:39 pm
Correct answer: (a) \(\frac{2}{3}\)C
Explanation:
We can conclude from the given equation
ω = 1010
k = 50
Speed = \(\frac{ω}{k}\) = \(\frac{10^{10}}{50}\)
= 2 × 108
= \(\frac{2}{3}\)C