Question

A radio can tune to any station in 7.5 MHz to 12 MHz band. The corresponding wavelength band is

• A. 25 m - 40 m
• B. 10 m - 30 m
• C. 20 - 40 m
• D. 25 - 35 m

Answer 1

Answer: (A)

25 m - 40 m

Answer 2

: Wavelength corresponding to $7.5$MHz frequency

$\lambda_{1} = \frac{c}{\upsilon} = \frac{3 \times 10^{8}}{7.5 \times 10^{6}} = 40m$

Wavelength corresponding to 12 MHz frequency

$\lambda_{2} = \frac{3 \times 10^{8}}{12 \times 10^{6}} = 25m$

Corresponding to the given frequency bands, the wavelength band is 25 m -40 m