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Question

A radio station transmits waves of wavelength 400 m. If the speed of the waves is 4×108ms1, Find the frequency of the radio station.
  1. 1 MHz
  2. 2 MHz
  3. 4 MHz
  4. 5 MHz

A
1 MHz
B
2 MHz
C
4 MHz
D
5 MHz
Solution
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The relation between wavelength (λ), wave speed (v) and frequency (f) is v=fλ
Thus, f=vλ=4×108400=106Hz=1MHz

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