Introduction to AC System

What characterizes alternating current (AC) electricity?

• Electrons flow in a single, constant direction.

• Electrons flow forwards and backwards constantly.

• Electrons remain stationary within the wire.

• Electrons only flow when a switch is pressed.

How is alternating current (AC) generated in a basic generator?

• By continuously pushing electrons in one direction using a battery.

• By rotating a magnet past coils of wire, causing a change in the magnetic field.

• By heating a wire to release electrons.

• By using a chemical reaction to produce a steady flow of electrons.

What does the frequency of an AC sine wave represent?

• The total amount of power delivered by the current.

• The number of times the sine wave repeats its cycle per second.

• The maximum voltage reached by the current.

• The speed at which electrons travel through the wire.

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What is a key advantage of three-phase electricity compared to single-phase electricity?

• Three-phase electricity uses fewer wires, making it cheaper to install.

• Three-phase electricity provides a more consistent power delivery with fewer gaps between peaks.

• Three-phase electricity can only be used in small residential homes.

• Three-phase electricity has a constant voltage, unlike single-phase.