Electrical Formulas

Electrical Formulas
Formula asas elektrik

The Formula Wheel of Electrical Engineering

V comes from “voltage” and E from “electromotive force (emf)”. E means also energy, so we choose V.
Energy = voltage × charge. E = V × Q. Some like better to stick to E instead to V, so do it. For R take Z.

The 12 most important Formulas:
Voltage V = I × R = P / I = √(P × R) in volts V Current I = V / R = P / V = √(P / R) in amperes A
Resistance R = V / I = P / I2 = V2 / P in ohms Ω Power P = V × I = R × I2 = V2 / R in watts W

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