chapter 8 electronics and information and communication tech

8/17/2019 Chapter 8 Electronics and Information and Communication Tech

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Name: …………………………………………… Class : ……Chapter 8Exercise 1Learning Area: Electronics and Information and Communication TechnologyLearning !"#ecti$e: %nderstanding radio &a$es

1 'iagram "elo& sho&s the displacement(distance graph of a &a$e

Name the parts la"el ) and *

) : ………………………… * : …………………………

+ ,ill in the "lan-s &ith suita"le &ord gi$en in the "ox "elo&

.a/ The ………………… displacement of particles from its ………………… position is

called ……………………… ."/ 0a$elength is the …………………… "et&een t&o consecuti$e ……………… or "et&een

t&o consecuti$e ……………………… of the &a$e

.c/ The num"er of complete …………………… generated in …………… second is -no&n as

…………………

'iagram "elo& sho&s the electromagnetic spectrum

2amma

raysX %ltra$iolet Y Infrared 3icro&a$e Z

8-1

Score: …./26 x 100 = …...%

'isplacement 4 m

'istance 4 m

*

)

crests distance fre5uency oscillation troughs amplitude e5uili"rium maximum one

.i/ …………………… increases

.ii/ …………………… decreases



.a/ !n the diagram a"o$e6 fill in the "lan-s .i/ and .ii/ &ith suita"le factor

."/ Identify &a$es

7 : ……………………………… : …………………………… 9 : ……………………

.c/ 0hat is the negati$e effect of extreme ultra$iolet rays on our s-in

……………………………………………………………………………………………………

.d/ Name two uses of micro&a$e

.i/ …………………………………………………………

.ii/ …………………………………………………………

; ,ill in the "lan-s &ith suita"le &ord gi$en in the "ox "elo&

……………… &a$es are suita"le for use in ……………………… "ecause it can ………

$ery far and as fast as …………………… They are not easily …………… "y ……………

in their &ay <esides they can also carry ……………… &a$es $ery far from their source

= The &ater &a$e generated in a ripple tan- has a &a$elength of += cm If the $i"rator is operating ata fre5uency of => ?@6 &hat is the speed of tra$el of the ripples

8-2

tra$el radio light "loc-ed o"stacles sound communication

peed B ,re5uency x 0a$elength v = f λ



Name: …………………………………………… Class : ……Chapter 8Exercise +Learning Area: Electronics and Information and Communication TechnologyLearning !"#ecti$e: Analysing radio communication

'ra& the sym"ol and match the functions of each electronic component in the ta"le

Electriccomponent Symbol Fnction

1 Capacitor %sed to control the current inany electrical circuit

+ 'iode tore electric charges anddischarge them at regularinter$al &hen re5uired

Inductor %sed to increase or decreasethe alternating current $oltageof an electrical po&er supply

; Transformer Act as a current amplifier

= Transistor Act as an electrical $al$e6allo&ing current to flo& in onedirection

Desistor %se to induce an electromoti$eforce

8-3

Score: …./12 x 100 = ……%



Name: ………………………………………… Class : ……Chapter 8Exercise Learning Area: Electronics and Information and Communication TechnologyLearning !"#ecti$e: Analysing radio communication

1 'iagram "elo& sho&s a schematic diagram of a radio transmission system and radio recei$ersystem tate the functions of each component

'iagram "elo& sho&s a schematic diagram of a radio transmission system

8-4

Score: …./2! x 100 = ….. %

Loudspeaker

Demodulator

Antenna / Aerial

(a)

(b)

/ Antenna

carrier waves

radio

carrier waves



.a/ !n the diagram a"o$e6 name parts la"elled )6 *6 D6 6 T and %

."/ There are t&o types of modulations6 amplitude modulation and fre5uency modulation 'ra&the t&o modulated &a$es in the spaces "elo&

8-5

P: ........................

Q:................

R:................

S: ........................

T:................

U: ........................

3odulated fre5uency &a$e .,3/ 3odulated amplitude &a$e .A3/



Name: …………………………………………… Class : ……Chapter 8Exercise ;Learning Area: Electronics and Information and Communication TechnologyLearning !"#ecti$e: %nderstanding satellite communication

1 'iagram "elo& sho&s a 2lo"al atellite Communication Net&or-

.a/ Name 7 and

."/ ?o& many communication satellites are needed to co$er &orld&ide communication

………………………………

.c/ .i/ 0hat type of signals are transmitted "y a satellite station to a communication satellite

…………………………………………………… .ii/ 2i$e one ad$antage of the signals stated in .c/.i/

……………………………………………………………………………………………

.d/ tate t"ree types of transmission that can "e sent through satellite communication

.i/ ……………………………………………………………

.ii/ ……………………………………………………………

.iii/ ……………………………………………………………

.e/ tate two applications of satellite communication

.i/ …………………………………………………………… .ii/ ……………………………………………………………

8-6

Score: …./10 x 100 = ….. %

X: ……………………...

Y: ……………………...

chapter 8 electronics and information and communication tech

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