The circuit shown is used to automatically turn on car parking lights:
(i) Identify the electronic components A, B, C and D - Leaving Cert Engineering - Question c - 2010
Question c
The circuit shown is used to automatically turn on car parking lights:
(i) Identify the electronic components A, B, C and D.
(ii) Describe two functions of component... show full transcript
Worked Solution & Example Answer:The circuit shown is used to automatically turn on car parking lights:
(i) Identify the electronic components A, B, C and D - Leaving Cert Engineering - Question c - 2010
Step 1
Identify the electronic components A, B, C and D.
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Answer
A – Light dependent resistor
B – Variable resistor
C – Bulb
D – Relay
Step 2
Describe two functions of component D in this circuit.
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Answer
The relay acts as a switch when the transistor is on. It allows the 12V circuit to activate from a 9V sensing circuit.
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