Which device transforms the energy of an electric current into another useful form of energy?

Which device transforms the energy of an electric current into another useful form of energy?

• A. Battery
• B. Conductor
• C. Insulator
• D. Load

Answer: (D)

Electric energy in a circuit becomes useful when a device uses it to do work, transforming that energy into another form. The device that does this is the load, such as a light bulb, heater, or motor, which converts electrical energy into light, heat, or motion. When current passes through a load, electrical energy is converted into the form needed by the device. A battery provides electrical energy but does not transform it within the circuit; it supplies energy. A conductor mainly conducts current with minimal energy change, except for small heating. An insulator resists current and does not actively transform electrical energy. So the component that converts electric energy into another useful form is the load.

Electric energy in a circuit becomes useful when a device uses it to do work, transforming that energy into another form. The device that does this is the load, such as a light bulb, heater, or motor, which converts electrical energy into light, heat, or motion. When current passes through a load, electrical energy is converted into the form needed by the device. A battery provides electrical energy but does not transform it within the circuit; it supplies energy. A conductor mainly conducts current with minimal energy change, except for small heating. An insulator resists current and does not actively transform electrical energy. So the component that converts electric energy into another useful form is the load.