What effect does high voltage have on the size of motors compared to equivalent direct current powered motors?

High voltage systems allow for the use of smaller and lighter motors compared to equivalent direct current (DC) powered motors due to the inherent efficiency of alternating current (AC) motors at higher voltages.

When motors are operated at higher voltages, they can produce the same amount of power while reducing the current needed to achieve that power output. This reduction in current leads to a decrease in the size and weight of the conductors and magnetic components within the motor, as less material is required to handle the lower current. Additionally, high-voltage operations can reduce losses associated with heat, enabling a more compact design without sacrificing performance.

In contrast, direct current systems often require larger motors to handle the increased amperage, which can lead to more substantial and heavier components to manage the higher current levels safely.

Thus, the correct answer highlights the advantages of high voltage in terms of size and weight efficiency of electrical motors compared to their DC counterparts.