What did the three-phase generator enable?

What did the three-phase generator enable?

• A. allowed efficient transfer of current over long distance with alternating current
• B. allowed efficient transfer of current over long distance with direct current
• C. reduced voltage requirements
• D. produced light automatically

Answer: (A)

The key idea is how three-phase generation affects how power is delivered. A three-phase generator creates three alternating current waveforms that are offset in time (by 120 degrees). This arrangement makes the overall power flow smoother and allows electricity to be transmitted at high voltages with less loss and with less conductor material. The result is efficient transfer of alternating current over long distances, which is exactly why three-phase systems are used for power grids. That’s why this option fits best: it describes efficient long-distance transmission of current when using alternating current, which matches the capabilities of a three-phase generator. The other ideas—direct current transmission, simply reducing voltage, or automatically producing light—don’t reflect what a three-phase generator is designed to do.

The key idea is how three-phase generation affects how power is delivered. A three-phase generator creates three alternating current waveforms that are offset in time (by 120 degrees). This arrangement makes the overall power flow smoother and allows electricity to be transmitted at high voltages with less loss and with less conductor material. The result is efficient transfer of alternating current over long distances, which is exactly why three-phase systems are used for power grids.

That’s why this option fits best: it describes efficient long-distance transmission of current when using alternating current, which matches the capabilities of a three-phase generator. The other ideas—direct current transmission, simply reducing voltage, or automatically producing light—don’t reflect what a three-phase generator is designed to do.