Power Resistance Equation

The nominal impedance z 4 8 and 16 ohms loudspeakers is often assumed as resistance r.

Power resistance equation. In the above circuit we know we have a battery voltage of 18 volts and a lamp resistance of 3 ω. The power used or dissipated by a resistor can be found using the formula v ir. V i r and the power law equation formula. How much power does it use.

The watts equation for an electrical circuit takes into account the voltage across the circuit v measured in volts and the current i measured in amps passing through it in mechanics the definition of power is the rate of doing work w it s defined as w t where t is the time it takes for the work to be completed. 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 get the result in watts work must be expressed in joules and time must. Power potential difference current 230 2 0 460 w.

Power current 2 resistance. P i v. Power current and resistance. 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. One ohm is defined as the resistance which allows the current of one ampere under a potential difference of 1 volt. 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. But we have designed this one especially for dc circuits as well as work for single phase ac circuits without power factor.

The standard metric unit of power is the watt. In this calculator table you may enter two of the four factors in ohm s law. Work done w 300 j time taken t. Electrical power can also be calculated using the equation.

The power formula is used to compute the power resistance voltage or current in any electrical circuit. 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. Deriving power and resistance formula will concrete the understanding of the concept. They are power p or w measured in watts voltage v or e measured in volts current or amperage i measured in amps amperes and resistance r measured in ohms.

An electric machine makes use of 300 j of energy to do work in 10s. Ohm s law equation formula. Power and resistance formula. Power voltage current resistance p v i r calculator.

Influare international ampere or intensity and r resistance. We ve seen the formula for determining the power in an electric circuit. Learn the power formula.