Languages: English

Develops a five-step procedure for analysing network circuits and uses it to analyse a model circuit built by referring to historic trolleys. Alternatives for public transit are identified using a risk-benefit model.

Repeats R.A. Millikan’s oil-drop experiment. Measures, collects and carries out an analysis of the data to determine the charge on one electron. Explores vector addition of forces and terminal velocity as applied in the procedure and analysis.

Explores the development of electrical systems in automobiles, from turn of the century cars to hybrid electric vehicles. Using automobile circuitry as a model, Kirchhoff’s rules are applied, and the connection made to conservation of charge and energy.

Observes the behaviour of light in experiments involving black body radiation and the photoelectric effect. When the observations are analyzed from the point of view of Maxwell’s model of light, it is obvious a new model is needed to explain the results.

Examines the use of a compass needle in navigation and links its behaviour to the Earth’s magnetic field. Explains how other common magnetic objects work and identifies the connection between an aurora display and magnets.

The concept of electromagnetism is introduced and investigated. The principles discussed are then applied to the workings of a malfunctioning speaker.

Viewers apply motor-effect principles to the design of electric DC motors. A quantitative investigation is performed to determine the force on a conductor in a magnetic field. Design, advantages and applications of DC motors are presented.

Auroras provide a context to study moving charges within a magnetic field. Shows that moving electric charges experience a force in magnetic fields and quantifies this force, and gives its direction using hand rules.

Investigates induction and provides explanations of the effect based on magnetic field-current interactions. Discussions with musicians and audio-recording personnel links the concept of electromagnetic induction to sound equipment.

Rotates a loop of wire in a magnetic field, returns to basic principles to explain the observations, and then compares generators to motors. Analyses the nature of alternating current and computes the effective values of sample circuits.