SKEMA JAWAPAN (SPM) : Electronic And Information And Communication System

CHAPTER 8 : ELECTRONIC AND INFORMATION AND COMMUNICATION SYSTEM

1  (a) the voltage of source of current

(b) source of current

(c) the bulb lighted up continuously when the switch is on

(d) capacitor allows alternate current to flow through it but prevents direct current to flow through it

(e) flow the unwanted radio signal to earth

2) (a) (i)  Intelsat I, Intelsat II, Intelsat III

(ii) It can cover communication system of all places of the world

(b) (i) It is a satellite that orbits round the earth in the same direction and velocity as the Earth's rotation

(ii) The satellite is always on the same spot above the earth

(c) Build an earth satellite station in a suitable place in the country

(d) weather forecast / research / navigation

3)(a) (i) Long Wave / Medium Wave

        (ii)The wave is easily diffracted

   (b) Ionosphere

   (c) Method B

   (d) (i)  Very High Frequency / Ultra High Frequency / Microwave

        (ii) It has high  frequency and is not reflected by the ionosphere