Explanation of Electromagnetic Induction Events

Electricity and magnetism are two things that cannot be separated. As is well known, both can produce each other. This is known as electromagnetic induction. To find out more, see the following explanation.

Definition of Electromagnetic Induction

Understanding Electromagnetic Induction is the phenomenon of an electric current generated by a voltage (electromotive force) as a result of a change in the magnetic field in an electric conductor (coil).

The event of Electromagnetic Induction was first discovered by Michael Faraday in 1831 which was then continued by James Clerk Maxwell by bringing up a mathematical theory as Faraday’s law of induction.

The value of the induction can be calculated using a tool called a galvanoener. Galvanoener is a tool used to measure the value of electromagnetic induction that has been recognized by the international world.

If there is induction, the needle in the tool will move to the right or left. This shows that induction and its change are vector quantities, i.e. they must include direction.

For more detail in understanding what is meant by electromagnetic induction, consider some important points below:

Magnetic flux

Before proceeding, you need to know the magnetic flux. This is a term to describe the lines connecting the two poles. Flux is also identical to the strength of the magnet itself.

Electric coil and flow

Furthermore, the electromagnetic occurs in the coil which is given an electric current. One side and the other close to each other, causing an attractive force. The principle of two electricity. This force is similar to a magnet and even has the same character.

Change of flux and direction

Electromagnetic induction is a change in flux in the coil due to a bar magnet being moved in and out. The flux changes direction, unit, and composition following the movement. This change ultimately causes motion and then into energy which will be channeled back as electricity.

Principle of Electromagnetic Induction

In his research on the event of Electromagnetic Induction converting energy into electrical energy, Michael Faraday arranges the conductor cables according to the settings that you can see in the example of the circuit picture above.

Seen a wire attached to the device to measure the voltage in the circuit. When a bar magnet is moved through the coil, the voltage detector measures the value of the voltage present in the circuit.

Electromagnetic Induction Event This occurs when a conductor is placed in a moving magnetic field (when using an AC power source) or when a conductor is constantly moving in a stationary magnetic field.

Through his experiments, he found that there are certain factors that affect the value of the voltage in the electric circuit, which include:

  • Number of Coils: The induced voltage is directly proportional to the number of turns/coils of wire. The greater the number of turns, the greater the voltage generated
  • Magnetic Field: Changes that occur in the magnetic field will affect the resulting induced voltage. This process can be accomplished by moving a magnetic field around a conductor or moving a conductor in a magnetic field.

From the experiment on electromagnetic induction events above, the world gets the conclusion from Faraday’s law theory, namely “The amount of voltage induced in a coil is proportional to the number of turns of the coil and the rate of change of the magnetic field”.

Examples of Equipment Utilizing the Principle of Electromagnetic Induction

To know more about electromagnetic induction, you need to understand applications and examples of equipment that uses the properties of electromagnetic induction. Check out the following list of equipment that utilizes the principle of electromagnetic induction for further understanding:


Generator is a power generating device that uses the principle of induction. This tool uses a large-scale magnet and coil so that it is able to provide a fast flux change and the energy increases significantly.

Electric motor

Smaller versions of the generator are electric motors and dynamos. The working principle is the same as before, namely relying on motion and then energy appears. This motion comes from rotation, for example, if you install a dynamo on a bicycle, the results of pedaling become a source of motion for magnetic changes.


Induction is also used to manage voltage. This function is applied to the transformer. The two coils are brought close to each other so that an induced attractive force occurs. Furthermore, one side will increase the potential difference and the other side will decrease. This method is used by pln to make voltage and power according to the needs of the community.

Examples of Electromagnetic Induction questions for this material can be seen in the chapter on electronic components, especially transformers. One more thing that is also important is knowing the efficiency based on the incoming and outgoing voltages and the number of turns.


Electronic components that specifically use the principle of induction are inductors. As the name implies, this tool functions to regulate voltage, signal, power, including increasing it.

The inductor is mounted directly on the electronic circuit or integrated as an IC. The type also varies according to capacity and material.

Factors Affecting the Value of Electromagnetic Induction

The principle of electromagnetic induction is based on flux, motion and electricity. Everything is in accordance with the principle of induction which moves the magnet to the iron in the same direction then the iron will have magnetic properties.

The same movement is applied to an electric coil and a flux change occurs so that there is a new magnetic field. The factors that influence it are as follows.

Magnet movement speed

A bar magnet that moves quickly in and out of the coil will cause a drastic change so that the energy also increases. So, the speed is directly proportional to the strength of the induction.

Number of turns

The next factor is the number of turns. Coils that have less turns produce lower flux and vice versa when you apply more turns. When another magnet starts to move, a large flux will cause a faster and larger change.

Magnetic strength

Every magnet has a power that is the ability to attract. For example, you have two bar magnets and one is left outside the house. The magnet will be eroded due to exposure to dirt and air. So, a strong magnet will give greater results.

From what we have explained about electromagnetic induction, you know the concepts and formulas and their applications. You can try induction at home with a simple coil of wire and a power source from a low-voltage battery.

Next, prepare a bar magnet and feel the changes around the coil by spreading an iron ore or nail. In general, they will form a pattern or point to a certain angle.

That’s a review about Explanation of Electromagnetic Induction Events the parallaxcode.com team can describe. Hopefully the articles that we provide can be useful.