Home SCIENCE 3D Animation How Resistors Work

3D Animation How Resistors Work


Resistors are fundamental electronic components that control and regulate the flow of electric current in electrical circuits.A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.The amount of current flowing into a resistor is exactly the same as the current flowing out of it.

source.image: The Engineering Mindset

The resistor reduces the current in the whole circuit. If you add a resistor in series with a circuit – the current in the whole circuit will be lower than without the resistor.Resistors work by introducing a controlled opposition to the flow of electric current. The resistance offered by a resistor is determined by its material, dimensions, and temperature. Watch the video from The Engineering Mindset:

The flow of electrons, which constitute the electric current, is impeded by the resistor’s material, causing the electrons to collide with atoms in the material, generating heat.The electrical function of a resistor is specified by its resistance: common commercial resistors are manufactured over a range of more than nine orders of magnitude.


The behaviour of an ideal resistor is described by Ohm’s law:Ohm’s law states that the voltage (V) across a resistor is proportional to the current (I) passing through it, where the constant of proportionality is the resistance (R). For example, if a 300-ohm resistor is attached across the terminals of a 12-volt battery, then a current of 12 / 300 = 0.04 amperes flows through that resistor.