A) \[5\,MHz\]
B) \[2\,MHz\]
C) \[0.5\,MHz\]
D) \[0\,MHz\]
Correct Answer: B
Solution :
[b] Here: Velocity of electromagnetic waves in free space and wavelength \[v=3\times {{10}^{8}}m/s\] and \[\lambda =150m\] The frequency of radio waves is given by \[=\frac{v}{\lambda }=\frac{3\times {{10}^{8}}}{150}=2\times {{10}^{6}}Hz=2\,MHz.\]
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