Final answer:
Direct Current (DC) is the most commonly used modality that provides a constant and direct current. It differs from Alternating Current (AC), which periodically reverses direction. DC is widely used in battery-powered applications, such as in cars.
Step-by-step explanation:
The most commonly used modality that is a constant and direct current is Direct Current (DC). Direct current (DC) is the flow of electric charge in only one direction, and it represents the steady state of a constant-voltage circuit. This type of current is differentiated from Alternating Current (AC), which periodically reverses direction.
DC is commonly used in many applications, including those utilizing batteries like cars. In homes and businesses, however, AC is more commonly used because of its ability to be transmitted over long distances with less energy loss.
The most commonly used modality that is a constant and direct current is Direct Current (DC). Direct current is the flow of electric charge in only one direction and it is the steady state of a constant-voltage circuit. Alternating current (AC) is the flow of electric charge that periodically reverses direction.