STANDARDPhysics-Electromagnetic Waves
STANDARD Physics Radio Waves MCQ Question
Type: MCQ-numerical-Medium-Class 12
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
Correct Answer
Option A
Detailed Explanation
Here, ν₁ = 7.5 MHz, ν₂ = 12 MHz. λ₁ = c/ν₁ = 3 × 10⁸ / 7.5 × 10⁶ = 40 m and λ₂ = c/ν₂ = 3 × 10⁸ / 12 × 10⁶ = 25 m.
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