Question

a radio station broadcast on a frequency of 200 khz if the speed of the wave is 3x10 rest power 8 pdf step by step

Answer 1

Answer: Given:-

Frequency (f) = 200kHz = 2×10⁵Hz.

Wavelength ( λ ) = 1500m.

Frequency of another station (f) =250Hz.

To Find:-

(a) Speed of radio wave in m/s

(b) wavelength of another signal ( λ ') .

Solution:-

(a)

As we know that

→ v = f λ

here v is the speed of wave

f is the frequency

λ is the wavelength

Substitute the value we get

→ v = 2×10⁵ ×1500

→ v = 3000 ×10⁵

→ v = 3× 10⁸m/s

∴ The speed of the radio wave is 3×10⁸m/s.

And Now

(b)

As from above solution the speed of radio wave is 3×10⁸ m/s.

Frequency = 250Hz

→ v = f λ

Substitute the value we get

→ 3×10⁸ = 250 × λ

→ λ = 3×10⁸/250

→ λ = 1200000m

→ λ = 1.2×10⁶ m

∴ The wavelength of the another station is 1.2×10⁶m.

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