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This programme has as its setting, the Royal Institution of Great Britain, in London and provides an authentic setting for recreating the crucial experiments performed by Michael Faraday; experimen...ts which led him to discover the principles of the electric motor, the transformer, and the dynamo. The programme is introduced from Faraday's laboratory by the Director of the Royal Institution, Sir George Porter, FRS. This laboratory as used by Faraday in the 18th Century was originally part of the servants quarters of the Institution and lies in the basement of the building, It houses a unique collection of Faraday's original apparatus and now forms part of a museum. It was in the Lecture Theatre of the Royal Institution that Faraday presented his researches to the public and it is appropriate that it is from here that Dr. Goodman presents the rest of the programme. This consists of a series of demonstrations which recreate the experiments performed by Faraday and others, which led Faraday to his major discoveries in the field of electricity and electromagnetism. These are in order: 1. The Oersted Experiment that demonstrates that electricity and magnetism were linked by some common force; 2. That a current carrying wire attracts iron filings - an experiment devised by Sir Humphry Davy; 3. The Ampere experiment that demonstrates that parallel current carrying wires act like magnets and can attract and repel each other. This is followed by 4. Ampere's model of a magnet, being a current carrying helix of wire; 5. The model demonstrating the principle of the electric motor; 6. The induction ring experiment which is the principle behind the transformer; 7. The importance of momentary relative motion between magnet and conductor in generating a momentary electrical impulse and following on from this: 8. The demonstration of continuous relative movement; between magniot and conductor which generates a continuous electrical impulse or current which is the dynamo principle; 9. A simple demonstration of the lines of force about a magnet which has as its relevance the fact that Faraday was keenly interested in the space surrounding magnets and what was to become field theory.
Metadata describing this Open University video programme
Module code and title: AST281, Science and the rise of technology since 1800
Item code: AST281; 04
First transmission date: 15-12-1972
Published: 1972
Rights Statement:
Restrictions on use:
Duration: 00:25:00
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Producer: Nat Taylor
Contributors: David Goodman; Sir George Porter
Publisher: BBC Open University
Keyword(s): Ampere; Electromagnetism; Faraday, Michael; Magnets; Oersted experiment; Royal Institution
Footage description: Sir George Porter introduces the programme in the laboratory used by Faraday in the Royal Institution. Shots of equipment include: 1. Electromagnet; 2. Chemical apparatus; 3. Electrical apparatus; 4. Ledgers containing written up reports of experiments. Sir George Porter outlines Faraday's life. Portrait of Faraday and shots of Faraday's statue. David Goodman describes how electrical phenomena had been known for many centuries he lists the most common. David Goodman describes the theory of fluids in magnetics advanced in the 18th century to account for these electrical phenomena. David Goodman goes on to describe the Kantian philosophy of forces. David Goodman demonstrated Hans Christian Oersted's experiment - the interaction between a current carrying wire and a compass needle. David Goodman describes Davy and Faraday's repetition of the experiment; he demonstrates the iron filings and wire along which an electric current is passing - an experiment of Davy in his search for analogies between electricity and magnetism. Goodman now demonstrates Ampere's experiment involving parallel current carrying wires. David Goodman also demonstrates Ampere's model of a magnet. The proliferation of electromagnetic experiments in the l820's is described; David Goodman describes also the inception of Faraday's 'Historical sketch' written on the insistence of Richard Phillips. David Goodman analyses the article and briefly describes Faraday's approach to theory and his considered opinion of existing theories. David Goodman describes Faraday's theory. David Goodman demonstrates Faraday's 1821 - circular motion apparatus. The apparatus is described in detail. David Goodman demonstrates and describes Faraday's ring experiment. The apparatus is described in detail. David Goodman demonstrates Faraday's experiment in which a magnet is thrust in and out of a copper coil. David Goodman now describes and demonstrates Faraday's 'dynamo' experiment. He goes on to describe Faraday's subsequent researches which led to the beginning of field theory. David Goodman briefly describes later work in light and gravity and closes the programme with the magnet and iron filings experiment.
Master spool number: 6HT/70897
Production number: 00525_3031
Videofinder number: 3364
Available to public: no