The shaft in the motor will rotate due to the magnetic field produced by the alternating current. In induction motors, inductors control the speed of the motor. The use of an inductor coil in the switch that comes in contact with the flow of AC produces a magnetic field. The proximity sensors mechanism is used in traffic lights to detect traffic density.Ī relay behaves as an electrical switch. The main principle behind it is inductance, which is the magnetic field in the coil opposing the flow of electric current. Inductive proximity sensors are very reliable in operation and are contactless. You can see this in computer circuits where power supplies can be switched. The energy is stored as a magnetic field and will disappear when the power supply is removed. It modifies the frequency and helps to select within multiple channels of frequency. Electronic devices such as radio tuning circuits and television use capacitors along with the inductor. Through the use of inductors, the tuning circuits can select the desired frequency. This is used in a power source where the AC supply converts into DC. Then, the inductor chokes the AC flow and passes the DC. When AC flows through inductors, it creates a current flow in the opposite direction. Uses of inductors depend in electrical transmission requirements. As the electricity flows into the coil from left to right, it generates a magnetic field in a clockwise direction. Therefore, inductors oppose any changes in current through them.Īn inductor is capable of storing energy in the form of magnetic fields. However, Lenz’s law states that the induced voltage has a polarity that opposes the change in current that created it. The time-varying magnetic field induces an electromotive force in the conductor described by Faraday’s law of induction.
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