Question 1:
Diagram 1.1 shows three satellites used in a satellite communication system.
Diagram 1.1
(a) Name type of wave used in a satellite communication system. [1 mark]
(b) State two reasons why three satellites are needed in transmitting information. [2 marks]
(c) Diagram 1.2 shows two types of wave in a radio communication system.
Diagram 1.2
(i) Draw wave K in the box provided in diagram 1.2. [1 mark]
(ii) What is the process involved to produce wave K? [1 mark]
(iii) Name the equipment used in 1(c)(ii). [1 mark]
Answer:
(a) Microwaves
(b)
Diagram 1.1 shows three satellites used in a satellite communication system.
Diagram 1.1
(a) Name type of wave used in a satellite communication system. [1 mark]
(b) State two reasons why three satellites are needed in transmitting information. [2 marks]
(c) Diagram 1.2 shows two types of wave in a radio communication system.
Diagram 1.2
(i) Draw wave K in the box provided in diagram 1.2. [1 mark]
(ii) What is the process involved to produce wave K? [1 mark]
(iii) Name the equipment used in 1(c)(ii). [1 mark]
Answer:
(a) Microwaves
(b)
- To provide communication services throughout the world.
- To form a communication network among all the earth satellite stations from all over the world.
(c)(i)
(c)(ii) Modulation
(c)(iii) Modulator