Current Ampere Formula

The current i in amps a is equal to the power p in watts w divided by the voltage v in volts v.

Current ampere formula. The si unit of electric current is the ampere or amp which is the flow of electric charge across a surface at the rate of one coulomb per second. The voltage v in volts v is equal to the current i in amps a times the resistance r in ohms ω. I a p w v v so amps are equal to watts divided by volts. The electric current is given by.

15 electric current is measured using a device called an ammeter. Amp watt volt. The nominal impedance z 4 8 and 16 ohms loudspeakers is often assumed as resistance r. The international system of units defines the ampere in terms of other base units by.

Ampere a volt v ohm ω this formula is derived from ohm s law. What is the current in amps when the power consumption is 330 watts and the voltage supply is. It is named after andré marie ampère 1775 1836 french mathematician and physicist considered the father of electromagnetism. If you want to calculate secondary current then we need to take secondary voltage only.

Secondary current in amps i s a s kva 1000 v s v example. Ohm s law equation formula. V i r and the power law equation formula. A often shortened to amp is the base unit of electric current in the international system of units si.

V voltage electric potential difference δ v or e electromotive force emf voltage. To learn about the formula and examples visit byju s. P power i or j latin. I v r corresponding units.

The ampere ˈ æ m p ɛər us. Ampere s law is the relationship between magnetic fields and the electric current passing through the closed loop. Dc watts to amps calculation formula. It states that for a closed path the sum over elements of the component of the magnetic field is equal to electric current multiplied by the empty s permeability.

Ohm s law calculator calculation calculate ohms power formulas mathematical ohm s law pie chart electric voltage drop electric current resistance formula watt s law emf magic triangle tip online voltage volts resistor resistance amps amperes audio engineering e v i r p v i calc conductivity resistivity relation relationship eberhard sengpiel sengpielaudio. A is an si base unit. The power p in watts w is equal to the voltage v in volts v times the current i in amps a. Ampere s law formula ampere s law allows us to calculate magnetic fields from the relation between the electric currents that generate this magnetic fields.

Calculate the full load current of the single phase transformer rating of 25kva 230 volts. I p r corresponding units. Electric currents cause joule heating which creates light in incandescent light bulbs. Full load current in amps 25 1000 230 108 696 a.

Influare international ampere or intensity and r resistance. P i v. Resistance if the electric power and the total resistance are known then the current can be determined by using the following formula. V v i a r ω.