Advertisements
Advertisements
Question
Answer briefly.
How does the effective power radiated by an antenna vary with wavelength?
Solution
- To transmit a signal, an antenna or an aerial is needed.
- Power radiated from a linear antenna of length l is, `"P" prop ("l"/λ)^2`
where λ is the wavelength of the signal.
APPEARS IN
RELATED QUESTIONS
Choose the correct option.
The maximum distance up to which TV transmission from a TV tower of height h can be received is proportional to
Choose the correct option.
If a TV telecast is to cover a radius of 640 km, what should be the height of the transmitting antenna?
Answer briefly.
What are EM waves?
Answer briefly.
How are EM waves produced?
Answer briefly.
Why should broadcasting programs use different frequencies?
Solve the numerical problem.
In an EM wave, the electric field oscillates sinusoidally at a frequency of 2 × 1010 Hz. What is the wavelength of the wave?
Solve the numerical problem.
A TV tower has a height of 200 m. How much population is covered by TV transmission if the average population density around the tower is 1000/km2? (Radius of the Earth = 6.4 × 106 m)
Solve the numerical problem.
Height of a TV tower is 600 m at a given place. Calculate its coverage range if the radius of the Earth is 6400 km. What should be the height to get the double coverage area?
