Which electrical appliances not work on the principle of the heating effect of electric current?
VerifiedAnswer: Electric fan
Explanation:
An electric fan works on the principle of electromagnetic induction and motor action, not on the heating effect of electric current. When electricity flows through the motor windings of a fan, it creates a magnetic field that interacts with permanent magnets or other magnetic fields to produce rotational motion.
The heating effect of electric current, also known as Joule's heating effect, occurs when electrical energy is converted into heat energy due to the resistance in a conductor. This principle is used in appliances like electric heaters, toasters, electric irons, incandescent bulbs, and electric kettles where the primary purpose is to generate heat.
In contrast, an electric fan converts electrical energy into mechanical energy to create air circulation. The motor inside the fan uses the magnetic effect of electric current rather than its heating effect. The current flowing through the coils creates magnetic fields that cause the rotor to spin, which in turn rotates the fan blades to move air.
Other examples of electrical appliances that do not work on the heating effect include electric motors, washing machines, mixers, air conditioners, refrigerators, and LED lights. These devices primarily utilize other effects of electric current such as magnetic effects, chemical effects, or direct light emission rather than generating heat as their main function.
