A resistive load, or resistive load bank, is an object in which a current runs in phase with its voltage. They are commonly used as heat generators or incandescent light bulbs.
Resistive loads typically convert energy into heat as a result of the electrical process moving from each component of the system to the next. The heat must then be expelled from the system through a medium such as air or water. This energy can be utilized purposely in heating devices.
Optimizing the voltage use of a resistive load is essential to its efficiency. When a resistive load operates under the proper voltage, it ensures a constant supply of energy and protection from loss of energy to sensitive devices.