Q1
What does a fuse do?
AMelts and breaks circuit on overcurrent
BIncreases current flow
CDecreases voltage only
DNothing specific
ICSEClass 10 (ICSE)PhysicsCh 9 · Topic 1
Household Circuits
Household electrical circuits use safety devices like fuses and earthing, and understanding wiring systems is important for electrical safet
Core concept
A fuse is a safety device that melts and breaks the circuit when current exceeds a safe limit, protecting appliances and preventing fires.
How it works
Earthing (grounding) connects an appliance's metal body to the earth, providing a safe path for current in case of a fault, preventing electric shocks.
Why it matters
Household circuits use a three-pin plug system with live, neutral, and earth wires, each serving distinct safety and functional purposes.
Key detail
Appliances are connected in parallel in household wiring, ensuring each device receives full voltage and operates independently of others.
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Quick notes
• A fuse melts and breaks circuit on overcurrent.
• It protects appliances and prevents fires.
• Earthing connects metal body to earth.
• This provides a safe path during faults.
• It prevents electric shocks.
• Three-pin plugs: live, neutral, earth wires.
• Each wire has a distinct purpose.
• Household appliances connect in parallel.