Voltage current resistance and electric power general basic …

Electric Current, Electric Power, Electrical Voltage Electricity and Electric Charge Formulas and Calculations The relationship between electrical parameters Electric voltage V, amperage I, resistivity R, impedance Z, wattage and power P Volt V, ampere A, resistance and impedance , and watt W The nominal impedance Z = 4, 8, and 16 ohms (loudspeakers) is often assumed as resistance R. Ohm's law equation (formula): V = I R and the power law equation (formula): P = I V. P = power, I or J = Latin: influare, international ampere, or intensity and R = resistance. V = voltage, electric potential difference V or E = electro motive force (EMF = voltage). Enter any two of the following values and click the calculation button. The missing values will be calculated. Please, enter only two values. The used Browser unfortunately supports no Javascript. The program is indicated, but the actual function is missing. The Formula Wheel of Electrical Engineering V comes from "voltage" and E from "electromotive force". E means also energy, so V is chosen. Energy = voltage charge. E = V Q. Some like better to stick to E instead to V, so do it. Voltage V = I R = P / I = (P R) in volts VCurrent I = V / R = P / V = (P / R) in amperes A Resistance R = V / I = P / I2 = V2 / P in ohms Power P = V I = R I2 = V2 / R in watts W See also: The Formula Wheel of Acoustics (Audio)

Tip: The electric power triangle (power formula) Please enter two values, the third value will be calculated.

The magic triangle can be used to calculate all formulas of the "electric power law". You hide with a finger the value to be calculated. The other two values show then how to do the calculation.

Calculations: Ohm's law - Ohm's magic triangle Measurement of input impedance and output impedance

ALTERNATINGCURRENT (AC) ~

Vl = line voltage (volts), Vp = phase voltage (volts), Il = line current (amps), Ip = phase current (amps) Z = impedance (ohms), P = power (watts), = power factor angle, VAR = volt-amperes (reactive)

In acoustics we have an "Acoustic equivalent for ohm's law"

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Voltage current resistance and electric power general basic ...