Question

Choose the correct answer from the alternatives given.
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

The correct option is A 40 m to 25 m

$Here,{\upsilon }_1=7.5MHz,{\upsilon }_2=12MHz$
$\therefore {\lambda }_1=\frac{c}{{\upsilon }_1}=\frac{3\times {10}^8}{7.5\times {10}^6}=40m$
$and{\lambda }_2=\frac{c}{{\upsilon }_2}=\frac{3\times {10}^8}{12\times {10}^6}=25m$