Ohm S Law Video Tutorial

This means that if we plot voltage on the x axis of a graph and current on the y axis of the graph we will get a straight line.

Ohm s law video tutorial. Ohm s law is v ir where v voltage i current and r resistance. Ohms law pie. 2 the r s on the right hand side of the equation cancel. Ohm s law tells us that if a conductor is at a constant temperature the current flowing through the conductor is directly proportional to the voltage across it.

It explains how to apply ohm s law in a series circuit and in a parallel circui. 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. In this tutorial we re going to learn about what ohm s law is where you. 1 since v voltage and r resistance are known solve for i current by dividing both sides of the equation by r.

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. 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. With this setup instead of having to choose the resistor for the led the resistor is already on board with the led so the current limiting is accomplished without having to add a resistor by hand. Ohm s law is a foundational equation in basic circuits and is amazing in its simplicity and its usage.

Ohm s law can be used to validate the static values of circuit components current levels voltage supplies and voltage drops. The ohm s law equation is often explored in physics labs using a resistor a battery pack an ammeter and a voltmeter. Another example of this implementation is seen in the lilypad led boards. An ammeter is a device used to measure the current at a given location.

3 i is then left in terms of v and r. This electronics video tutorial provides a basic introduction into ohm s law. You ll often need to use ohm s law to change the amount of current flowing through the circuit.