CAIE IGCSE Physics 4.4.4 Why the Outer Casing of an Electrical Questions
Learn how earthed metal cases conduct fault current and why double insulation reduces shock risk.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- explain how an earthed metal case conducts fault current
- distinguish conducting cases that need earthing from double insulation
- link earthing appliance cases to reduced shock risk
CAIE IGCSE Physics 4.4.4 Why the Outer Casing of an Electrical Questions question 1
[Maximum number: 1]
Four statements about safety when designing electrical products are listed.
1 If the outer casing is a conductor, it should be earthed.
2 If the outer casing is a conductor, it should not be earthed.
3 If the outer casing is an insulator, it should be earthed.
4 If the outer casing is an insulator, it should not be earthed.
Which statements are correct?
A
1 and 3
B
1 and 4
C
2 and 3
D
2 and 4
B
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