Electrical Projects - Doorbell Circuit - JSS1 Basic technology Past Questions and Answers - page 1
1
What is the focus of this week?
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A
Lighting systems
B
Security Cameras
C
Doorbell circuit
D
Heating systems
2
What is the purpose of a doorbell circuit?
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A
To control lighting systems
B
To activate security cameras
C
To produce a ringing sound
D
To regulate heating systems
3
Which component completes the circuit in a doorbell circuit when pressed?
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A
Transformer
B
Bell or buzzer
C
Power source
D
Push-Button switch
4
What is the function of the transformer in a doorbell circuit?
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A
To produce a ringing sound
B
To complete the circuit
C
To step down the voltage
D
To activate the bell or buzzer
5
Where is the push-button switch typically installed in a doorbell circuit?
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A
Near the power source
B
Near the bell or buzzer
C
Near the door
D
Near the transformer
6
What happens when the push-button switch is pressed in a doorbell circuit?
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A
The circuit is disconnected
B
The circuit is completed
C
The voltage is increased
D
The transformer is deactivated
7
What role does the bell or buzzer play in a doorbell circuit?
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A
Completes the circuit
B
Steps down the voltage
C
Produces the ringing sound
D
Activates the Push-Button switch
8
How is the voltage typically supplied to a doorbell circuit?
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A
High-voltage AC
B
Low-voltage AC
C
High-voltage DC
D
Low-voltage DC
9
What is the primary application of a doorbell circuit?
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A
Controlling lighting systems
B
Activating security cameras
C
Producing a ringing sound
D
Regulating heating systems
10
Which component of the doorbell circuit steps down the voltage?
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A
Bell or buzzer
B
Push-Button switch
C
Transformer
D
Power source
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