Thinking about Science with David Hukins

In this post, I am returning to the subject of relative motion, that I first described in posts 16.4 and 16.12.

Maxwell’s equations describe the behaviour of electric fields and magnetic fields; a more detailed introduction appears in post 25.12.

This post is a sequel to post 26.4 so I suggest you read that first.

This is a sequel to post 26.03, so I suggest you read that first.

Ampère’s law considers the electric current, I, enclosed by a magnetic field, B, that forms a closed loop.

In post 18.6, I defined a simple harmonic oscillator as a system that was constantly exchanging potential energy and kinetic energy while conserving their sum.

I have read several articles about the increasing number of English parents who pay to send their children to private schools and then pay extra for private tuition to gain them a place at Oxford or Cambridge universities (often referred to collectively as

In post 25.10, I defined the magnetic field, B, caused by an electric current, I1, in a long straight wire, at a point given by a vector r, perpendicular to the wire, by where μ is the permeability of the stuff surrounding the wire, and i × r is the cross…

In post 25.10, I used a special case of the Biot-Savart law to define magnetic field.

So far, in this blog, I have explained that magnetic fields are a result of an electric current (see posts 16.25 and 25.10).