quiz 13 Flashcards
Why is it dangerous for the live wire to touch the neutral or earth wire?
Short circuit, low resistance, high current, fire
Describe the role of a fuse in a circuit.
It melts and breaks the circuit if the current is above a certain value
What surrounds the outside of wires in household electrical goods?
Electrical insulation
What is the role of the neutral wire?
completes the circuit by carrying away current
What are the 3 wires in a three-core cable?
Live, neutral and earth
What is the potential difference of the earth wire?
0 V
Which wire in a three-core cable has green and yellow stripes?
Earth
What colour is the live wire in a three-core cable?
Brown
State 2 risks of electricity.
Electrocution and fire
What is the potential difference between the neutral wire and earth?
0 V
Which wire in a three-core cable is the fuse connected to?
Live
Why is it dangerous to touch a live wire, even when the circuit is off?
Electrocution
Define power.
Energy transferred per second
What is the potential difference between the live wire and earth?
230 V
Which wire in a three-core cable is brown?
Live
Which wire in a three-core cable is blue?
Neutral
What is the role of the earth wire?
safety wire to stop the appliance becoming live
What colour is the earth wire in a three-core cable?
Green and yellow stripes
What is the role of the live wire?
carries the alternating potential difference from the supply
What colour is the neutral wire in a three-core cable?
blue
