The height of the antenna is 98 m. The radius of Earth is 6400 km. The area up to which it will transmit signal is:
Show Hint
For line-of-sight calculations, use the approximate formula d = √2Rh.
- 3642 km2
- 3942 km2
- 11200 km2
- 22400 km2
The Correct Option is B
Approach Solution - 1
Step 1: Use the formula for surface area covered.- Maximum distance covered d = $\sqrt{2RhT}$.- Surface area A = πd2 ≈ 2πRhT.
Step 2: Substitute the values.
A=2πRhT
A = 2 · 3.14 · 6400 · 98 · 10-3.
A ≈ 3942 km2.
Final Answer: Surface area covered = 3942km2.
Approach Solution -2
\(r = \sqrt{2Rh}\)
Area \(= \Pi r^{2} = 2\Pi Rh\)
\(= 2 \times \frac{22}{7} \times 6400 \times 103 \times 98\)
\(= 3942.4 \times 106m^{2}\)
\(= 3942.4 km^{2}\)
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Communication Systems
A system that describes the information exchange between two points is called the communication system. The transmission and reception process of information is called communication. The major elements of communication are such as:
- The Transmitter of information
- Channel or medium of communication
- The Receiver of information
Examples Of Communication Systems:
The following are the examples of communication systems:
- Internet
- Public Switched Telephone network
- Intranet and Extranet
- Television
Types Of Communication Systems:
Turning on Signal specification or technology, the communication system is categorized as follows:
- Analog technology communicates data as electronic signals of differing frequencies or amplitude. For instance Broadcast and telephone transmission.
- In Digital technology, the data are created and processed in two states: High (represented as 1) and Low (represented as 0). Also this technology stores and transmits data in the form of 1's and 0's.
Elements of a Communication System:
