How To Find Resistance From Power And Voltage

V voltage electric potential difference δ v or e electromotive force emf voltage.

How to find resistance from power and voltage. P i v. V 10 ma x 15 kω. Remember to use the total voltage across the circuit or the voltage of the battery powering the circuit. Influare international ampere or intensity and r resistance.

They are power p or w measured in watts voltage v or e measured in volts current or amperage i measured in amps and resistance r measured in ohms. Rearrange ohm s law in terms of i. Find the voltage applied across 15 kω resistors when 10 ma current flows through it. But we have designed this one especially for dc circuits as well as work for single phase ac circuits without power factor.

Using the example in step 1 with a voltage of 50 volts and a current of 2 amps the resistance is 50 2 or 25 ohms. Then divide the voltage across the circuit by the total resistance to find the current. P v v r. V i r and the power law equation formula.

Find resistance from power and voltage. The nominal impedance z 4 8 and 16 ohms loudspeakers is often assumed as resistance r. Voltage volts current amps x resistance ω. Once you have the current calculate voltage for the individual resistors by multiplying the current by the resistance.

The needed factor will be calculated for you when you click on the calculate button for that table. Power watt voltage current resistance. If you only know the power and voltage you can use a similar approach to find resistance. Some persons think that georg simon ohm calculated the specific resistance.

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. To calculate voltage across a resistor in a series circuit start by adding together all of the resistance values in the circuit. Therefore they think that only the following can be the true ohm s law. If the unit of power p i v and of voltage v i r is needed look for the big power formulas.

Power voltage current resistance p v i r calculator. Substitute v r for i in the power formula. I v r. The above calculator will help you to calculate the power using a simple power formula.

How to calculate power. The electrical relationships between resistance r current i power p and voltage e is defined by ohm s law. P power i or j latin. The power used or dissipated by a resistor can be found using the formula v ir.

V 150 v. One ohm is defined as the resistance which allows the current of one ampere under a potential difference of 1 volt. Ohm s law equation formula.