Countries: CA

Viewers are challenged to devise a source of potential difference from provided materials. Investigates electric-current concepts by discussion, laboratory work and interviews. Discusses the change in energy for various loads in an electric circuit.

Discusses the relative energy of electromagnetic waves of different frequencies ii terms of their penetrating ability in human tissue. Focuses on the many EMR devices used in biomedical applications.

Investigates the nature of resistance and safety when dealing with electric circuits. Focuses on the dangers posed by electric current and how to avoid them. Uses Ohm’s law and the power equations to quantify energy transfers occurring.

Traces historical events that led up to the discovery of cathode rays and X-rays. Explains that science often progresses in a haphazard way: one chance observation may lead to a whole new field of inquiry with a completely unexpected set of applications.

Gathers and analyses quantitative data of simple series and parallel circuits. The analysis develops mathematical expressions describing the relationships among current, voltage, resistance and power in electric circuits.

A detailed analysis of J.J. Thomson’s charge-to-mass ratio experiement. Data from the experiment is used to calculate the ratio of charge to mass for one electron. The concepts used in the investigation are linked to television technology.

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.