Demystifying Electromagnetics, Part 8 – Losses

All the energy we utilise day to day originates from the sun. The fusion processes…

Demystifying Electromagnetics, Part 7 – Solenoids

“I have no special talents. I am only passionately curious.” – Albert Einstein, March 11, 1952. Inspired by the great man himself, I was curious if the nail solenoid was powerful enough to pierce, say, a grape (it was a slow day)….

Demystifying Electromagnetics, Part 6 – Relays

Over the last 5 blogs in this series we’ve introduced a set of EM building blocks, fundamental behaviours that hopefully have been demystified by the use of analogy. At last, and not before time, we can get on to an actual application – Relays….

Demystifying Electromagnetics, Part 5 – Ferromagnetic Cores

A coil of wire creates a magnetic field when a current passes through it. The…

Demystifying Electromagnetics, Part 4 – Inductors

Welcome to Part 4 in this blog series that hopes to demystify electromagnetics for those of you who might have a background in mechanical engineering, fluid flow and heat transfer. Ultimately we’ll be getting onto electric motors, generators, induction cooking, levitation, loud speakers etc. etc. but for now some more basics – Inductors….

Electric Fields without and with a conductor

Demystifying Electromagnetics, Part 2 – Wires

Ohm’s Law is just a flow rate, analogous to fluid mass flow. What’s that got to do with EM and what is Temperature and Joule heating anyway?…