Edexcel IGCSE Physics 2.12 Lamps & LEDs
Practise recognising lamp and LED symbols and deciding how these components show that current is present in a circuit.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- identify the circuit symbol for a filament lamp or LED from a diagram or table
- explain that a lamp or LED can indicate current flow or whether a fuse is working
2.12 Lamps and LEDs question 1
Question (a)
(a)
Diagram 1 shows an electric circuit used to test a fuse.
d.c. power supply
Diagram 1
[ 1 ]
Question (i)
(i)
Give a reason why an LED is included in the circuit.
[ 1 ]
Question (b)
(b)
Diagram 2 shows a different electric circuit containing three different lamps.
Diagram 2
[ 3 ]
Question (i)
(i)
Explain which lamp is the brightest.
[ 3 ]
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