Volts Amps Resistance
This formulae circle is very useful for many electrical engineering.
Volts amps resistance. How to calculate with watts amps volts and ohms. Let s say for example that we have a circuit with the potential of 1 volt a current of 1 amp and resistance of 1 ohm. Ohm s law provides an alternate formula to find volts if amps and the electrical resistance is known. R resistance in ohms.
This is called ohm s law. If you want to do an electrical calculation involving voltage current resistance or power reference the formulae circle below. Advertisement a neat analogy to help understand these terms is a system of plumbing pipes. V voltage in volts.
The voltage v in volts v is equal to the power p in watts w divided by the current i in amps a. For example we can calculate the power in watts by referencing the yellow area in the circle. To calculate amps divide the voltage by the resistance in ohms. The voltage v in volts v is equal to the square root of the power p in watts w times the resistance r in ohms ω.
Current a voltage v resistance ω for example let s find the current of a 12 volt circuit with 10 ohms of resistance. The simplest way to convert from amps to resistance is by the formula of ohm s law dividing the voltage between the current. I current in amps. Voltage is measured in volts current is measured in amps and resistance is measured in ohms.