A radio can tune to any station in 7.5 M

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Target Exam

CUET

Subject

Physics

Chapter

Electromagnetic Waves

Question:

A radio can tune to any station in 7.5 MHz to 12 MHz band. The corresponding wavelength band is:

Options:

40 m to 25 m

30 m to 25 m

25 m to 10 m

10 m to 5 m

Correct Answer:

40 m to 25 m

Explanation:

Here, $v_1$ = 7.5 MHz , $v_2$ = 12 MHz

∴ $\lambda_1=\frac{c}{v_1}=\frac{3 × 10^8}{7.5 × 10^6}$ = 40 m and $\lambda_2=\frac{c}{v_2}=\frac{3 × 10^8}{12 × 10^6}$ = 25 m