Electrical Laws
Ohm's law, Kirchhoff's laws and the conservation principles that make circuit analysis possible.
Ohm’s Law
Ohm’s law links voltage, current and resistance with V = I × R. Learn the formula triangle, the limits of the law and how to use...
Kirchhoff’s Current Law (KCL)
Kirchhoff’s current law states that the charge entering a node equals the charge leaving it. Learn the node equation, sign conve...
Kirchhoff’s Voltage Law (KVL)
Kirchhoff’s voltage law states that voltages around a closed loop sum to zero. Learn the loop equation, sign conventions and how...
Faraday’s Law of Induction
Faraday’s law says a changing magnetic flux induces an EMF. Learn the formula, Lenz’s sign, motional EMF and how generators and...
Lenz’s Law
Lenz’s law says an induced current opposes the change that created it. Learn the sign of induced EMF, energy conservation and ex...
Coulomb’s Law
Coulomb’s law gives the force between two point charges: it grows with the charges and falls with the square of the distance. Le...