The core of a transformer Illustration Play

The core of a transformer Simulation Play

The double helix Student activity Play

The double helix Slideshow Play

The Earth's field Animation Play

The electric bell Student activity Play

The electromagnet Animation Play

The electromagnet Animation Play

The electromagnet Whiteboard exercise Play

The electromagnet Student activity Play

The magnetic field around a circular conductor Animation Play

The magnetic field of a coil Whiteboard exercise Play

The magnetic field of a coil Animation Play

The magnetic field of a coil Student activity Play

The magnetic field of a coil Whiteboard exercise Play

The magnetic field of a coil Student activity Play

The magnetic field of a flat coil Whiteboard exercise Play

The magnetic field of a flat coil Student activity Play

The measurement of the Earth's flux density Whiteboard exercise Play

The measurement of the Earth's flux density Student activity Play

The period of alternating current Animation Play

The relationship between voltage and the number of turns in a coil Student activity Play

The relationship between voltage and the number of turns in a coil Simulation Play

The relationship between voltage and the number of turns in a coil Whiteboard exercise Play

The relay switch Student activity Play