Electrical energy II - JSS3 Basic science Past Questions and Answers - page 2
What role does a fuse play in an electrical circuit?
A fuse acts as a safety device in an electrical circuit by breaking the circuit if there's too much current flowing through it, thus preventing damage to appliances or fires.
Can you explain how fuses and circuits work together?
Fuses and circuits work together to maintain electrical safety. Fuses monitor the flow of electricity within circuits and break the circuit if the current exceeds a safe level, preventing overheating and potential hazards.
Where is an electric meter typically installed, and what does it measure?
An electric meter is usually installed outside of a home and measures the amount of electricity consumed by the household, typically in kilowatt-hours (kWh).
How does a blown fuse impact an electrical circuit?
When a fuse blows, it interrupts the flow of electricity in the circuit, effectively disconnecting it. This prevents further damage to appliances or wiring caused by excessive current flow.
What function does an electric meter serve for utility companies?
Electric meters provide utility companies with data on the amount of electricity consumed by a household, allowing them to accurately bill customers for their usage.
In what ways do fuses contribute to electrical safety?
Fuses contribute to electrical safety by preventing overheating and potential hazards in circuits. They achieve this by breaking the circuit if the current exceeds a safe level, thus protecting appliances and wiring from damage.