Question

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

• A. 40 m to 25 m
• B. 30 m to 25 m
• C. 25 m to 10 m
• D. 10 m to 5 m

Answer 1

Answer: (A)

40 m to 25 m

Answer 2

: Here, $\upsilon_{1} = 7.5MHz,\upsilon_{2} = 12MHz$

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

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