Final answer:
The statement is true; a voltaic cell generates direct current (DC), while the main electrical supply at homes typically provides alternating current (AC).
Step-by-step explanation:
The statement 'A voltaic cell produces direct current, which flows in one direction. The main electrical supply at your home is a source of alternating current.' is True. A voltaic cell, similar to a battery, provides electrical energy through a redox reaction, which results in the flow of electric charge in one constant direction, or direct current (DC). In contrast, the main power supply in homes is typically alternating current (AC), where the flow of electric charge periodically reverses direction. Direct current is characterized by a constant flow of charge in one direction, and hence a constant voltage, making it suitable for devices like solar cells and batteries. Alternating current, on the other hand, varies sinusoidally with time, which means that the magnitude and direction of the current change at regular intervals. This makes AC suitable for household and commercial power uses because it can be easily transformed to different voltages and is more efficient for long-distance transmission.