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# Electricity 101: What is Ohm’s Law? Ohm’s Law is a scientific rule that helps us understand how electricity works. Electricity is the flow of tiny particles called electrons through materials that allow them to move freely. These materials are called conductors.

Ohm’s Law tells us that the amount of electricity flowing through a conductor is related to how much resistance the conductor has to the flow of electrons. Resistance is a measure of how hard it is for the electrons to move through the conductor.

We can use Ohm’s Law to calculate how much current (the flow of electrons) there will be in a circuit if we know the voltage (the force that pushes the electrons through the conductor) and the resistance. The formula for Ohm’s Law is:

Current (I) = Voltage (V) / Resistance (R)

For example, let’s say we have a flashlight with a battery that has a voltage of 3 volts and a light bulb in the flashlight that has a resistance of 2 ohms. Ohm’s Law tells us that the current flowing through the light bulb will be 1.5 amps (3 volts / 2 ohms = 1.5 amps).

Ohm’s Law is a very important rule in electricity and helps us understand how different devices and circuits work. It’s used by engineers and scientists to design and build all sorts of things that use electricity, like phones, computers, and even electric cars.

So the next time you turn on a light or use your phone, think about Ohm’s Law and how it’s helping to make all of these things work!

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