What term describes a load greater than the rated load of an electrical device?

• A. Overload
• B. Permeability
• C. Phase difference
• D. Polarity

Answer: (A)

When a device is asked to carry more current than it is designed to handle, this condition is called an overload. The rating on equipment specifies the maximum current (and often voltage and thermal limits) it can safely carry. Exceeding that rating causes extra heating (I squared R losses) and mechanical/insulation stress, which can shorten life, trip protective devices, or lead to failure. Protective devices like fuses and circuit breakers are meant to interrupt the circuit when an overload is detected to keep things safe.

Other terms don’t describe this situation: permeability is about how easily magnetic fields pass through a material, phase difference refers to the lag between voltage and current in AC circuits, and polarity is about which terminal is positive or negative. These describe different electrical properties, not the condition of carrying more than the rated load.