What is the function of a mains cable?

What is the function of a mains cable?

• A. Carries electricity through a device
• B. Stores electrical energy
• C. Converts alternating current to direct current
• D. Regulates current in a circuit

Answer: (A)

Providing a conductive path for electrical energy from the mains to a device. The mains cable’s job is to carry the electrical power so the device can operate—current flows from the live wire through the device and back via the neutral wire, with the earth wire offering a safety path in case of faults. It does not store energy like a battery, nor does it change alternating current to direct current, and it doesn’t regulate how much current flows—that’s handled by the device itself or by other circuitry.

Providing a conductive path for electrical energy from the mains to a device. The mains cable’s job is to carry the electrical power so the device can operate—current flows from the live wire through the device and back via the neutral wire, with the earth wire offering a safety path in case of faults. It does not store energy like a battery, nor does it change alternating current to direct current, and it doesn’t regulate how much current flows—that’s handled by the device itself or by other circuitry.