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Welcome to our Physics lesson on Applications of Inductance in Technology, this is the third lesson of our suite of physics lessons covering the topic of Inductance and Self-Induction, you can find links to the other lessons within this tutorial and access additional physics learning resources below this lesson.
Applications of Inductance in Technology
There is a wide range of inductance application in modern electronic devices. Some of them include:
- Filters. Inductors are used together with capacitors and resistors (as we will see in the upcoming tutorials) to create filters that prevent undesired frequencies from mixing with the signal and allowing only certain bands of signal frequency (the desired ones) to pass through.
- Sensors. Inductors are very good in detecting magnetic fields or the presence of magnetic materials from a certain distance. Therefore, they are used in cars, traffic lights, measuring devices etc.
However, inductive sensors are limited in two major ways. Either the object to be sensed must be magnetic and induce a current in the sensor, or the sensor must be connected to a power source to detect the presence of materials that interact with a magnetic field. These parameters limit the applications of inductive sensors and influence the designs that use them. - Transformers. They are devices that are used to change the value of potential difference in a power transmission system in order to save energy or to make the values fit the electric appliances. Transformers are devices that are built by combining inductors that have a shared magnetic path.
- Electric Motors. We have seen that electric motors are operated by making a coil turn between two magnets. This action bring a rotation of the circuit that powers the coil as well. This is not practical and consumes a lot of energy. To prevent this, an inductor is installed in the place where the circuit and the coil meet. The inductor does not require any direct contact between the parts it connects, so the coil can rotate while the supplying circuit remains stationary.
- Tape recorder. Although an outdated device, tape recorder is one of the most important inventions of the last century. It converts sound into electric signal through a microphone and an amplifier. This current then passes through the coil of an electromagnet. After a few processes, the tape is magnetised, causing a varying flux through the playback coil. As a result, the original voice is reproduced in the original frequencies giving an identical pattern when replayed.
You have reached the end of Physics lesson 16.9.3 Applications of Inductance in Technology. There are 3 lessons in this physics tutorial covering Inductance and Self-Induction, you can access all the lessons from this tutorial below.
More Inductance and Self-Induction Lessons and Learning Resources
Magnetism Learning Material| Tutorial ID | Physics Tutorial Title | Tutorial | Video
Tutorial | Revision
Notes | Revision
Questions |
|---|
| 16.9 | Inductance and Self-Induction | | | | |
| Lesson ID | Physics Lesson Title | Lesson | Video
Lesson |
|---|
| 16.9.1 | The Meaning of Inductance | | |
| 16.9.2 | Another Approach on Inductance | | |
| 16.9.3 | Applications of Inductance in Technology | | |
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