Domestic circuits

What is the color and function of the neutral wire in the UK?

• Blue - completes the circuit
• Brown - carries the alternating potential difference from the supply
• Green and yellow stripes - safety wire
• Red - carries the alternating potential difference from the supply

What is the voltage of the domestic electricity supply in the UK?

• 240 V
• 230 V
• 220 V
• 110 V

What is the definition of alternating current (a.c.)?

• An electric current that flows in one direction
• An electric current that changes direction constantly
• An electric current that flows in both directions
• An electric current that is stationary

What is the frequency of the domestic electricity supply in the UK?

• 75 Hz
• 100 Hz
• 50 Hz
• 25 Hz

What is the color and function of the live wire in the UK?

• Brown - carries the alternating potential difference from the supply
• Red - carries the alternating potential difference from the supply
• Blue - completes the circuit
• Green and yellow stripes - safety wire

Why is a live wire considered dangerous?

• It carries the alternating potential difference from the supply
• It completes the circuit
• It is a safety wire
• It can cause an electric shock

What is the color and function of the earth wire in the UK?

• Red - carries the alternating potential difference from the supply
• Green and yellow stripes - safety wire
• Blue - completes the circuit
• Brown - carries the alternating potential difference from the supply

What is the definition of direct current (d.c.)?

• An electric current that flows in both directions
• An electric current that flows in one direction
• An electric current that is stationary
• An electric current that changes direction constantly