Fuses & earthing (Edexcel GCSE Physics): Quizzes
📚Quizzes
Practise the questions
11 questions from this quiz
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Practise the questions
11 questions from this quiz
What is the main purpose of fuses and earthing in electrical circuits?
What is the main purpose of fuses and earthing in electrical circuits?
To prevent overloads and protect from shock
What is an electrical surge?
What is an electrical surge?
A sudden increase in current
Which of these can cause an electrical surge?
Which of these can cause an electrical surge?
An appliance suddenly switching off
What danger can electrical surges cause to wires?
What danger can electrical surges cause to wires?
Wires overheat and melt, causing fires
What causes a fuse to melt and break the circuit?
What causes a fuse to melt and break the circuit?
Current exceeding the fuse rating
Which wire is the fuse connected to in an electrical circuit?
Which wire is the fuse connected to in an electrical circuit?
The live wire
What is the fuse rating?
What is the fuse rating?
The maximum current before melting
An appliance normally operates at . What fuse rating should be used?
An appliance normally operates at . What fuse rating should be used?
Around
Which appliances must be earthed?
Which appliances must be earthed?
All appliances with metal cases
What does double insulation mean for an appliance?
What does double insulation mean for an appliance?
Plastic casing and no exposed metal parts
What is an advantage of circuit breakers over fuses?
What is an advantage of circuit breakers over fuses?
They can be reset instead of replaced