Which type of electric current is most commonly supplied to homes for powering appliances?

• A. Static current
• B. Pulsed current
• C. Direct current ($\mathrm{DC}$)
• D. Alternating current ($\mathrm{AC}$)

Answer: (D)

Verified step by step guidance

1. Understand the types of electric current: Static current is a stationary electric charge, not a flow of current; Pulsed current is a current that varies in pulses; Direct current (DC) flows in one constant direction; Alternating current (AC) periodically reverses direction.
2. Recall that household electrical systems require a current type that can be easily transformed to different voltages and efficiently transmitted over long distances.
3. Recognize that Alternating Current (AC) is used in homes because it can be stepped up or down in voltage using transformers, which makes it practical for power distribution.
4. Note that most appliances in homes are designed to operate on AC because the power grid supplies AC, and it is safer and more efficient for general use.
5. Conclude that the most common type of electric current supplied to homes for powering appliances is Alternating Current (AC).