Ohms Law Magic Circle, Lesson Plan

Voltage is measured using a voltmeter current is measured using an ammeter.

Free printable cute thanksgiving coloring pages. Use the magic power circle likewise. It is called the magic circle or sometimes called the magic triangle. The wheel below is a handy tool and memory jogger.

If the value of voltage is asked and the values of the current and resistance are given then to calculate voltage simply cover v at the top. Ohms law pie. Formula wheel electrical engineering electronics ohms law pie chart circle power wheel electric power formula fundamentals general ohms law emf ohms audio physics electricity electronics formula wheel formulas amps watts volts ohms cosine equation audio engineering pie chart charge physics formula for power calc voltage bridging eberhard sengpiel sengpielaudio.

The average automobile battery supplies 12 volts while a standard us. Some important facts to know for the exam. The combination of ohms law and joules law gives us 12 formulas where 2 of the 4 variables are known.

Using the magic circle. Ohms law pie chart. There is an easy way to remember the ohms law formula.

The following are excerpts from the slide presentation i use when teaching ohms law. It is used extensively in the study ofelectricity and electronics. To help us understand the the relationship between the various values a little further we can take all of the ohms 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.

To use it simply choose the quadrant corresponding to the variable you want to calculate then select the segment corresponding to the variables that you know the values of. This should help you understand how the basic formula can be changed with a little algebra for nding current and resistance. Remember when any two factors are known the third unknown factor can be calculated from ohms law.

P e x i. Ohms law magic triangle. Ohms law is a very simple and useful tool for analyzing electric circuits.