Power Resistance Formula

The standard metric unit of power is the watt.

Power resistance formula. By multiplying the voltage in volts by the current in amps we arrive at an answer in watts let s apply this to a circuit example. V 10 ma x 15 kω. Power voltage current resistance p v i r calculator. Work done w 300 j time taken t.

P power dissipated i 2 current r resistance or. The power used or dissipated by a resistor can be found using the formula v ir. The resistance value can be found by rearranging one of the forms of the electric power formula. How to calculate power.

V 150 v. The resistance value is 36 0 ω. The above calculator will help you to calculate the power using a simple power formula. The nominal impedance z 4 8 and 16 ohms loudspeakers is often assumed as resistance r.

V voltage electric potential difference δ v or e electromotive force emf voltage. An electric machine makes use of 300 j of energy to do work in 10s. P power dissipated v 2 voltage r resistance so using the above circuit diagram as our reference we can apply these formulas to determine the power dissipated by the resistor. Ohm s law equation formula.

Learn the power formula. Power p voltage v current i. How much power does it use. Therefore to calculate the power dissipated by the resistor the formulas are as follows.

But we have designed this one especially for dc circuits as well as work for single phase ac circuits without power factor. How to use ohm s law to determine current. Influare international ampere or intensity and r resistance. This formula can be used to substitute for the voltage or for the current in the power formula and the power output of a battery that has internal resistance can be found using the formula v ε ir and the formula for power.

We ve seen the formula for determining the power in an electric circuit. The power formula is used to compute the power resistance voltage or current in any electrical circuit. Power and resistance formula. The form that is applicable relates power voltage and resistance.

In the above circuit we know we have a battery voltage of 18 volts and a lamp resistance of 3 ω. If voltage and current are given then you can easily calculate the value of the power. Deriving power and resistance formula will concrete the understanding of the concept. What is the resistance value.

P i v. Electric power p is the measure of the electric current i with q coulombs of charge passing through a potential difference of v volts in time t seconds. Voltage volts current amps x resistance ω. P power i or j latin.