Question

A radio can tune to any station in $7.5MHz$ to $12MHz$ 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)

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 ${\lambda }_2=\frac{c}{{\upsilon }_2}=\frac{3\times 10^8}{12\times 10^6}=25m$