Ohm S Law Tutorial

What ohm s law is and how to use it to understand electricity.

Ohm s law tutorial. It explains how to apply ohm s law in a series circuit and in a parallel circui. In this tutorial we re going to learn about what ohm s law is where you can and can t use it and do a few examples of very very simple circuits. 1854 bavaria defines the relationship between power voltage current and resistance. These are the very basic electrical units we work with.

Georg ohm mathematician and physicist b. Ohm s law allows you to determine characteristics of a circuit such as how much current is flowing through it if you know the voltage of the battery in the circuit and how much resistance is in the circuit. Introducing the constant of proportionality the resistance one arrives at the usual mathematical equation that describes this relationship. An ammeter is a device used to measure the current at a given location.

To help us understand the the relationship between the various values a little further we can take all of the ohm s law equations from above for finding voltage current resistance and of course power and condense them into a simple ohms law pie chart for use in ac and dc circuits and calculations as shown. Ohms law pie. Where i is the current through the conductor in units of amperes v is the voltage measured across the conductor in. Ohm s law is a foundational equation in basic circuits and is amazing in its simplicity and its usage.

What voltage current and resistance are. A voltmeter is a device equipped with probes that can be touched to two locations on a circuit to determine the electric potential difference across those locations. Ohm s law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Covered in this tutorial.

Ohm s law can be used to validate the static values of circuit components current levels voltage supplies and voltage drops. This electronics video tutorial provides a basic introduction into ohm s law. If for example a test instrument detects a higher than normal current measurement it could mean that resistance has decreased or that voltage has increased causing a high voltage situation. The ohm s law equation is often explored in physics labs using a resistor a battery pack an ammeter and a voltmeter.

Here is a practical tutorial on ohm s law which will get you up and going with this simple relationship between current resistance and voltage. Ohm s law is v ir where v voltage i current and r resistance. Ohms law pie chart.