The flux changes when the current in a coil varies, which is the definition of induced EMF. To a coil’s turns, the flux is connected. EMF is produced by the coupling flux to the coil’s turns. Induced EMF is the name of this EMF. There are two forms of induced EMFs: statically induced and dynamically induced.
The other names for Induced EMF are induced electromotive force, electromagnetic induction, and electromotive force induction.
Types of Induced EMF
There are two primary types of induced EMF: statically induced EMF and dynamically induced EMF. Let’s examine each type in detail.
Statically Induced EMF
Statically induced EMF manifests when both the coil and the magnetic field system remain stationary simultaneously. In this scenario, the flux links to the coil without any physical movement of the coil or the magnetic field system. Notable examples of statically induced EMF can be found in inductors and transformers.
The change in flux linking to a coil occurs due to the alteration in the electric current within the field system. Statically induced EMF can be further classified into two categories:
a) Self-induced electromotive force
Self-induced electromotive force refers to the EMF that is induced in the coil due to the change in flux linking with its own turns. This phenomenon is particularly intriguing, as it demonstrates the coil’s ability to generate EMF in response to its own magnetic field fluctuations.
b) Mutually induced electromotive force
Mutually induced electromotive force arises when the change in flux produced by one coil induces EMF in another coil that is linked to it. This phenomenon showcases the interconnectedness of magnetic fields and the potential for inducing EMF in neighboring coils.
Dynamically Induced EMF
Dynamically induced EMF occurs when the conductor either moves while the field remains stationary or vice versa. In a DC generator, the coil typically rotates while the field remains in a fixed position. Conversely, in an AC alternator, the field rotates while the coils remain stationary. By following either of these processes, the conductor effectively cuts across the magnetic field, resulting in induced EMF within the coil.
Applications of Induced EMF
Induced EMF finds practical applications in a wide array of equipment and devices. Let’s explore some of the notable examples:
Generators: Induced EMF is the driving force behind generators, enabling the conversion of mechanical energy into electrical energy. By employing induced EMF principles, generators play a pivotal role in powering numerous electrical systems.
Galvanometers: Galvanometers utilize induced EMF to measure and detect electric currents. These devices leverage the interaction between a magnetic field and a coil to produce a deflection, enabling precise current measurements.
Transformers: Transformers heavily rely on induced EMF to transfer electrical energy between different voltage levels. By utilizing the principles of electromagnetic induction, transformers enable efficient power distribution and voltage regulation.
Motors: Induced EMF plays a important role in electric motors, which are widely used in various applications. By leveraging the power of induced EMF, motors can convert electrical energy into mechanical energy, enabling the movement of machinery and devices.
Inductors: Inductors, an essential component in electronic circuits, utilize induced EMF to store and release energy.
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