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With the increase in frequencies more than 2 MHz, Ground wave propagation
- a)Increases
- b)Fails
- c)Does not depend on the frequency of propagation
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
With the increase in frequencies more than 2 MHz, Ground wave propagat...
The ground wave is the preferred propagation type for long distance communication using frequencies below 3 MHz (the earth behaves as a conductor for all frequencies below 5 MHz). The ground wave is also used for short distance communications using frequencies between 3 and 30 MHz.
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With the increase in frequencies more than 2 MHz, Ground wave propagat...
Explanation:
Ground wave propagation is the transmission of radio waves along the surface of the Earth. The range of ground wave propagation is limited to a few hundred kilometers, and it decreases with the frequency of the signal. The increase in frequencies more than 2 MHz results in the following effects:
Fading and Attenuation:
As the frequency increases, the ground wave signal starts to fade, and attenuation increases. This is because the higher frequency signals are absorbed by the ground and other obstacles like buildings, trees, and hills. This effect is more pronounced at frequencies above 2 MHz.
Interference and Noise:
The higher frequency signals are more susceptible to interference and noise, which can disrupt the signal and make it difficult to receive.
Reflection and Refraction:
At higher frequencies, the radio waves tend to reflect and refract off the ionosphere, which can cause the signal to be lost or distorted.
Conclusion:
Thus, it can be concluded that ground wave propagation fails at frequencies above 2 MHz due to fading, attenuation, interference, noise, reflection, and refraction. As a result, other modes of propagation like sky wave and space wave are used for long-distance communication at higher frequencies.
Ground wave propagation is the transmission of radio waves along the surface of the Earth. The range of ground wave propagation is limited to a few hundred kilometers, and it decreases with the frequency of the signal. The increase in frequencies more than 2 MHz results in the following effects:
Fading and Attenuation:
As the frequency increases, the ground wave signal starts to fade, and attenuation increases. This is because the higher frequency signals are absorbed by the ground and other obstacles like buildings, trees, and hills. This effect is more pronounced at frequencies above 2 MHz.
Interference and Noise:
The higher frequency signals are more susceptible to interference and noise, which can disrupt the signal and make it difficult to receive.
Reflection and Refraction:
At higher frequencies, the radio waves tend to reflect and refract off the ionosphere, which can cause the signal to be lost or distorted.
Conclusion:
Thus, it can be concluded that ground wave propagation fails at frequencies above 2 MHz due to fading, attenuation, interference, noise, reflection, and refraction. As a result, other modes of propagation like sky wave and space wave are used for long-distance communication at higher frequencies.
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With the increase in frequencies more than 2 MHz, Ground wave propagationa)Increasesb)Failsc)Does not depend on the frequency of propagationd)None of the aboveCorrect answer is option 'B'. Can you explain this answer?
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