Electrical engineering

Kirchhoff laws and complete circuit

Node currents, loops, internal resistance and Joule heating.

Electrical engineering

Branch current from Kirchhoff's current law

I₃ = I₁ + I₂→
Electrical engineering

Loop EMF from Kirchhoff's voltage law

ε = I(R₁ + R₂)→
Electrical engineering

Complete circuit current

I = ε / (R + r)→
Electrical engineering

Joule heating

Q = I²Rt→