Edexcel IGCSE Physics 2.12 Lamps and Leds Questions
Identify lamp and LED symbols, then use their operation to check for current in a circuit.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- Identify which lamp or LED circuit symbols visibly indicate current in a circuit.
- Explain how an LED indicator shows that current is present or that a fuse is still working.
Edexcel IGCSE Physics 2.12 Lamps and Leds Questions question 1
Question (a)
(a)
Diagram 1 shows an electric circuit used to test a fuse.
d.c. power supply
Diagram 1
Question (i)
(i)
Give a reason why an LED is included in the circuit.
Question (b)
(b)
Diagram 2 shows a different electric circuit containing three different lamps.
Diagram 2
Question (i)
(i)
Explain which lamp is the brightest.
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