Name one key difference between AC and DC current.

The key difference between AC (Alternating Current) and DC (Direct Current) lies in the direction of flow of the electrical charge. In AC, the current alternates direction periodically, which means it changes its flow from positive to negative continuously, typically following a sinusoidal waveform. This characteristic allows it to be transported over long distances more efficiently, making it the preferred choice for powering homes and industries.

On the other hand, DC current flows in one direction only. This consistent flow is beneficial for certain applications, such as in batteries and electronic devices, where a stable voltage is required.

Recognizing this fundamental difference is crucial for understanding various aspects of electrical systems and how they are utilized in different applications. It highlights why AC is often employed for general distribution of electrical power, while DC is used in specific technologies like solar panels, electronic circuits, and battery-operated devices.