Which two voltages can single phase motors operate on?

Single-phase motors are typically designed to operate at two common voltage ranges: 110-120 volts and 220-240 volts. These voltage ranges reflect standard electrical systems found in residential and commercial settings.

In practice, 110-120 volts are frequently used for smaller appliances and tools, making them suitable for light-duty applications. The 220-240 volts range is often utilized for heavier-duty equipment, providing greater efficiency and power transfer. Utilizing these two voltages enables compatibility with a variety of electrical systems where such motors would be employed, ensuring versatility for both residential and commercial needs.

The other options do not reflect the standard voltages used for single-phase motors. For instance, voltages like 330-360 or ranges over 250 serve different applications and are not typical for standard single-phase motors. Additionally, while 50-60 could imply frequency, it does not pertain to voltage, and thus doesn't provide a relevant answer related to motor operation voltages.