Fuses & earthing (Edexcel GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
11 questions from this quiz
ShowHide
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 can cause an electrical surge in a circuit?
What can cause an electrical surge in a circuit?
An appliance suddenly switching off
What danger can result from electrical surges?
What danger can result from electrical surges?
Wires overheat and melt, causing fires
How does a fuse protect a circuit when a fault develops?
How does a fuse protect a circuit when a fault develops?
It melts and breaks the circuit
Which wire is the fuse connected to in a plug?
Which wire is the fuse connected to in a plug?
The live wire
What is a fuse rating?
What is a fuse rating?
The maximum current before it melts
If an appliance normally operates at , what fuse rating should be used?
If an appliance normally operates at , what fuse rating should be used?
Around
Why are thicker wires needed for larger currents?
Why are thicker wires needed for larger currents?
To safely carry current without melting
What is the purpose of earthing in electrical appliances?
What is the purpose of earthing in electrical appliances?
Directs fault current to ground, not person
What feature do double insulated appliances have?
What feature do double insulated appliances have?
A plastic casing with no exposed metal
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