Hi,

I'm interested in finding out what common formula's people use on a regular basis, eiether electronic or electrical.

The common ones are Ohms Law(v=IR), Watts Law (P=IV - don't know if it is actually called Watts law), potential dividers (Vout = R2/(R1+R2) xVin) etc.

Are there any other formulas that people use on a regular basis?

Many thanks in advance.