What type of current is primarily used in homes and businesses?

The correct answer is alternating current. This type of current is primarily used in homes and businesses for several reasons.

Alternating current (AC) allows electricity to change direction periodically, which is particularly advantageous for efficiently transmitting power over long distances. With AC, the voltage can be easily transformed using transformers, allowing for high-voltage transmission, which reduces energy losses and makes it more economical for utility companies. Once the power reaches its destination, the voltage can be stepped down to a lower level suitable for household use.

In contrast, direct current (DC) flows in one direction and is generally more suited for low-voltage applications, such as batteries and electronics. While it has specific uses, such as in certain appliances and electronic devices, it is not practical for widespread distribution in residential and commercial power systems. Static current refers to electricity that remains stationary, which is not applicable in this context of power delivery. Variable current is not a recognized category in standard electrical systems and does not pertain to common usage in homes and businesses. Thus, alternating current remains the standard for electrical distribution in everyday environments.