Bin bag capacitor (UK STEM video which shows how to introduce capacitors with a demonstration which uses a bin bag, aluminium foil , an EHT power supply and a centre-reading galvanometer. )
Eddy Current Vanes | Haukapo Rā Aurere (VUW Awhina resource)
An aluminium vane swings slowly between the poles of a magnet while a plastic vane is unimpeded. A slotted aluminium vane swings at intermediate speed.
Transformers (VUW Awhina resource)
A primer on transformers and their use in the electricity distribution grid.
Trick Magnet | Autō Nuka (VUW Awhina resource)
One of two apparently identical steel rods passes easily between the poles of a magnet while the other unavoidably sticks to the magnet. One is stainless steel, the other mild steel.
A Shocking Experience: The Van de Graaff Generator (VUW resource)
A Van de Graaff generator is used to make hair stand on end, generate sparks and so on.
Jumping Wire (VUW resource)
A wire carrying a DC current jumps up or down between the poles of a magnet depending on the directions of the current and magnetic field.
Floating Skier: A Levitating Superconductor (VUW resource)
A “skier” on a superconducting disk skies along a track by levitating above a magnetic strip. This is the reverse of the usual demonstration in which a small rare Earth magnet is levitated above as superconducting disk.
Levitating Magnet (VUW resource)
A magnet floats above a superconductor.
Electrical Properties of Superconductors (VUW resource)
Exploring electrical properties of superconductors using four-lead resistance measurements.
Microwaves (VUW resource)
A low-power apparatus is used to demonstrate the properties of microwaves. Detailed instructions are included for a number of experiments.
Bouncing Magnet (VUW resource)
A very large, very strong rare earth magnet is dropped onto a copper block cooled in liquid nitrogen. The magnet is seen to bounce “off the field” a few centimetres above the copper block. This surprising behaviour cannot be explained using Faraday’s law and Lenz’s laws as they are presented in secondary school textbooks alone. Why does the magnet bounce? High speed video shows the details of the motion. The effect is even more spectacular and more interesting when dropping a magnet on a superconductor.
Eddy Current Tubes (VUW resource)
A magnetic and non-magnetic pellet fall at the same rate in a plastic tube but not in an aluminium tube. What will happen with the slotted tube?
Thermal Generator (VUW resource)
Electricity generation with a Stirling engine.
Hand Generator (VUW resource)
Use a hand cranked generator to light a small light bulb.
Electric Pendulum (VUW resource)
A pendulum swings between two charged plates due to electrostatic forces.
Capacitor Spark (VUW resource)
Charge and discharge of capacitors, energy stored in a capacitor, high voltage safety.
Capacitor and Light Bulb (VUW resource)
A capacitor charges and discharges with a long time constant through a light whose brightness indicates the current.
Circuit Components (VUW resource)
A selection of circuit components shows the miniaturisation of electronics