Elec. 2 Unit10
Revision
1- Name four things which make use of electromagnetic waves .
1-……………………… 2- ……………………………….
3- ……………………… 4- ………………………………
2-Choose the correct word
1- (Loudspeaker – AF amplifier- RF tuner) converts the audio signal into sound.
2-(When- In-At) a cell discharging quickly, it may become hot.
3- (When-Out-At) striking a high building, microwave signals are deflected.
4- On (receive – receiving – receives) signals from the remote control, the TV follows your instructions.
3- 1- What do these abbreviations stand for :
1-AF ………………………………..
2- MD ………………………………
3- CD ………………………………..
4- FM ……………………………..
5- RF ……………………………..
6- VHF ………………………………
4- Draw diagram to explain these labels?
A- transmitting aerial
b- Receiving aerial
c- Sky wave
d- Space wave
5- Match (A) with (B)
A B
1- The aerial amplifies the selected RF wave
2-RF amplifier receives weak RF signals
3-AF amplifier selects the required RF wave
4-RF tuner amplifies the audio signal.
6 - Complete the following table
Noun( property) Noun(component) verb
attenuation
attenuate
Reflector
resistance
resist
Revision
1- Name four things which make use of electromagnetic waves .
1-……………………… 2- ……………………………….
3- ……………………… 4- ………………………………
2-Choose the correct word
1- (Loudspeaker – AF amplifier- RF tuner) converts the audio signal into sound.
2-(When- In-At) a cell discharging quickly, it may become hot.
3- (When-Out-At) striking a high building, microwave signals are deflected.
4- On (receive – receiving – receives) signals from the remote control, the TV follows your instructions.
3- 1- What do these abbreviations stand for :
1-AF ………………………………..
2- MD ………………………………
3- CD ………………………………..
4- FM ……………………………..
5- RF ……………………………..
6- VHF ………………………………
4- Draw diagram to explain these labels?
A- transmitting aerial
b- Receiving aerial
c- Sky wave
d- Space wave
5- Match (A) with (B)
A B
1- The aerial amplifies the selected RF wave
2-RF amplifier receives weak RF signals
3-AF amplifier selects the required RF wave
4-RF tuner amplifies the audio signal.
6 - Complete the following table
Noun( property) Noun(component) verb
attenuation
attenuate
Reflector
resistance
resist