Power Voltage Current Resistance

Power power p is a measure of the rate at which energy is delivered or used by a circuit element.

Power voltage current resistance. V voltage in volts. Using ohm s law we can say. Power voltage current resistance p v i r calculator. 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.

For this reason the quantities of voltage and resistance are often stated as being between or across two points in a circuit. The power p in watts w is equal to the voltage v in volts v times the current i in amps a. R resistance in ohms. More specifically ohm s law defined that the current i through a conductor between two points is directly proportional to the voltage v and is inversely proportional to the resistance r.

It is the most fundamental law that defines the relationship between the current i resistance r voltage v and power p. The amount of current in a circuit depends on the amount of voltage and the amount of resistance in the circuit to oppose current flow. The voltage v in volts v is equal to the current i in amps a times the resistance r in ohms ω. Voltages are generally expressed in volts with prefixes used to denote sub multiples of the voltage such as microvolts μv 10 6 v millivolts mv 10 3 v or kilovolts kv 10 3 v.

V v i a r ω. The current is equal to the electromotive force of the source divided by the total circuit resistance. Just like voltage resistance is a quantity relative between two points. This calculator is based on simple ohm s law as we have already shared ohm s law p i v r calculator in which you can also calculate three phase current.

Voltage sources deliver power while resistors use power by dissipating it as heat. But we have designed this one especially for dc circuits as well as work for single phase ac circuits without power factor.