Question

A radio can tune to any station in 6 MHz to 10 MHz 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)

20 m

Answer 2

$v_1=6×10^6\ Hz$
$λ_1=\frac {3×10^8}{6×10^6}$
$λ_1=50\ m$
$v_2=10×10^6\ Hz$
$λ_2=\frac {3×10^8}{10×10^6}$
$λ_2=30\ m$
The wavelength band with $=|λ_1−λ_2|=20\ m$

So, the correct option is (B): 20 m.