Mains electricity

Question 1

How are electrical appliances connected to the main supply?

Answer 1

• Using 3 core cables.
• Wires= Made from copper (good conduction of electricity).
• ## Cotains= Made from plastic (does not conduct electricity).

Question 2

What does the brown wire do?

Answer 2

• Live wire.
• Carries the Alternating potential difference from the supply.
• around 230 volts.

Question 3

What is the live wire?

Answer 3

• Connected to a fuse in a plug.
• Dangerous and fatal if touched.
• If someone touched a live wire;
• Current flows through the person into the earth and they’d be electrocuted.

Question 4

What is the blue wire?

Answer 4

• Nuetral wire.
• Completes the circuit.
• Potential Difference= 0 Volts.
  compared to live wire.

Question 5

What is the green and yellow striped wire?

Answer 5

• Earth wire.
• Safety precaution to stop the wire from becoming live.
• Huge current flows to the earth wire and the fuse melts and shuts off the curent.