Edexcel IGCSE Physics · Spec 2.2-2.4
Electrical Heating, Fuses and Circuit Protection
Covers explain heating in a resistor, Distinguish insulation, earthing, fuses and circuit breakers and Select a suitable fuse using P = IV.
Physics revision video
Electrical Heating, Fuses and Circuit Protection
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Spec 2.2-2.4
What you need to know
- Explain heating in a resistor
- Distinguish insulation, earthing, fuses and circuit breakers
- Select a suitable fuse using P = IV
Active recall
Quick check
Answer each question before opening the answer.
How does a resistor heat up?
Electrons transfer energy in collisions with lattice ions
What is the difference between a fuse and circuit breaker?
A fuse melts once; a circuit breaker trips and can be reset
Which fuse suits an 8.7 A appliance?
13 A
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