Which statement correctly describes the live wire?

Which statement correctly describes the live wire?

• A. Copper wire coated in brown plastic that carries the alternating potential difference pushing current in the circuit
• B. Copper wire coated in blue plastic that carries current away from the component
• C. Copper wire coated in green and yellow plastic that connects to earth
• D. Copper wire coated in white plastic that blocks current

Answer: (A)

In mains wiring, colors show what each conductor does: brown is the live conductor, blue is the neutral, and green/yellow is earth. The live wire is the one connected to the power supply and carries a potential difference relative to earth that drives current through the circuit. In alternating current, this potential difference changes with time, so the live conductor pushes current around the circuit as the voltage oscillates. That description fits a copper wire with brown insulation that carries the alternating potential difference pushing current in the circuit. The other options describe different roles: blue is the neutral, which returns current toward the supply; green/yellow is earth, a safety path to ground; and a white-insulated wire doesn’t inherently block current—insulation is about safety and protection, not a property that makes it the live conductor.

In mains wiring, colors show what each conductor does: brown is the live conductor, blue is the neutral, and green/yellow is earth. The live wire is the one connected to the power supply and carries a potential difference relative to earth that drives current through the circuit. In alternating current, this potential difference changes with time, so the live conductor pushes current around the circuit as the voltage oscillates. That description fits a copper wire with brown insulation that carries the alternating potential difference pushing current in the circuit.

The other options describe different roles: blue is the neutral, which returns current toward the supply; green/yellow is earth, a safety path to ground; and a white-insulated wire doesn’t inherently block current—insulation is about safety and protection, not a property that makes it the live conductor.