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Discusses the invisible force field of magnetism which surrounds the earth. Sensitive compasses were used to map the intensity and direction of the magnetic field at the earth’s surface, and recently...
Demonstrates the properties of magnetic circuits with permanent magnets and pieces of soft iron. Shows how magnetic circuits can be shaped to give fields appropriate to particular devices and demonstrates...
Examines the fourth state of matter called plasma and how very hot plasma at temperatures of 100 million degrees can be contained and controlled by magnetic fields.
Looks at some of the research which seeks to discover how this magnetic field affects living organisms. Much of the research shown is American.
Part 1 explains the Lorentz force by considering a free-moving positively charged particle in a uniform magnetic field and the ‘right-hand’ screw is defined. The helical motion resulting from the...
By means of the magneto-optic Kerr effect, WEISS domains (tiny crystal parts) can be made visible and their changes followed as a magnetic field is set up. Simple magnetic reversal processes, caused by the...
Experiments using transparent electrolyte, mercury and liquid sodium-potassium alloy demonstrate the interactions between electro-magnetic and velocity fields which are central to magnetohydrodynamics.
The story of magnetism. Illustrates the ways in which scientists found that magnetism existed and how, through research, industry has revealed more of the nature of this force. Discusses the development and...
The physical principles of domain formation, with particular emphasis on the energies involved in the process. The techniques used in observing domains are described, and domain patterns which confirm the...
Three programmes telling the story of electricity and the history of its discovery and applications. The first programme SPARK, is about the very first scientists who studied electricity. Known as ‘natural...
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