Question

A radio can tune to any station in $6MHz$ to $10MHz$ band. The value of corresponding wavelength bandwidth will be :

• A. 4 m
• B. 20 m
• C. 30 m
• D. 50 m

Answer 1

Answer: (B)

Given: Frequency $f_1=6MHz$
Frequency $f_2=10MHz$
${\lambda }_1=\frac{c}{f_1}$
${\lambda }_2=\frac{c}{f_2}$
Wavelength bandwidth $={\lambda }_2-{\lambda }_1=20m$