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प्रश्न
Answer the following question.
On what factors does the range of coverage in ground wave propagation depend?
उत्तर
The ground wave propagation is preferred usually for long-distance communication using frequencies below 3 MHz. The range of coverage of ground wave propagation depends on transmitted power and frequency.
संबंधित प्रश्न
Write a short note on surface wave propagation of electromagnetic waves.
(i) Which mode of propagation is used by shortwave broadcast services having frequency range from a few MHz upto 30 MHz? Explain diagrammatically how long distance communication can be achieved by this mode.
(ii) Why is there an upper limit to frequency of waves used in this mode?
In which directions do the electric and magnetic field vectors oscillate in an electromagnetic wave propagating along the x-axis?
Four nuclei of an element undergo fusion to form a heavier nucleus, with release of energy. Which of the two – the parent or the daughter nucleus – would have higher binding energy per nucleon?
An em wave is travelling in a medium with a velocity `vecv =vhati` Draw a sketch showing the propagation of the em wave, indicating the direction of the oscillating electric and magnetic fields.
In sky wave mode of propagation, why is the frequency range of transmitting signals restricted to less than 30 MHz?
Answer the following question.
In the skywave mode of propagation, why is the frequency range of transmitting signals restricted to less than 30 MHz?
Depict the fields diagram of an electromagnetic wave propagating along positive X-axis with its electric field along the Y-axis.
In He-Ne loser the most favourable ratio of Helium toNe on for satisfactory laser action is
A TV transmission tower has a height of 240 m. Signals broadcast from this tower will be received by LOS communication at a distance of (assume the radius of earth to be 6.4 × 106 m)
- 100 km
- 24 km
- 55 km
- 50 km
