Electric Current

I: current (A), q: charge (C), t: time

Ohm's Law

U: electric potential difference between the ends of the resistor R

Work Created By A Current (Joule's Law)

Electrical Power


ρ: resistivity of the material (Ωm), l: length (m), A: cross-section area (a2)

Series Circuits

Parallel Circuits

Work Or Heat Energy Produced By A Resistor

Power Consumption Of A Resistor

Electromotive Force Of An Electrical Generator

W: work of force (J), q: charge(c)

Generators In Series

r: internal resistance of the generator

Generators In Parallel

Generators In Series-Parallel

Work And Power Of Generator

H: Efficiency of genarator