Magnetism (2 Parts)

Synopsis: 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 application of magnetic force to moving particles (both positive and negative) is then dealt with. Continues with an explanation of the forces exerted by a magnetic field on the carriers in a current carrying semi-conductor material (Hall effect). Finally the forces on a straight conductor and rectangular loop are examined.
Part 2 describes the magnetic field produced by a long wire carrying a current and defines the relationship between magnetic induction B and magnetic field strength H. The magnetic field around a circular hoop, a solenoid and a toroid are then analysed. Concludes with an explanation of the three types of magnetism - ferro, para and dia.
Language: English
Country: Great Britain
Medium: Film; Video; Film. 16mm. sd. col. 2 X 22 min. Videocassette. VHS. col. 2 X 22 min.
Technical information: Black-and-white / Sound
Year of production: 1969
Availability: OUT OF DISTRIBUTION
Uses: To assist with the teaching of electricity and magnetism at sixth form level; first-year university physics courses.*
Subjects: Physics
Keywords: electromagnetism; magnetism

Title: Lorentz force and Hall effect, The
Synopsis: 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 application of magnetic force to moving particles (both pos
Title: The magnetic field of a current
Synopsis: Part 2 describes the magnetic field produced by a long wire carrying a current and defines the relationship between magnetic induction B and magnetic field strength H. The magnetic field around a circular hoop, a solenoid and a toroid are then analysed. C

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British Universities Film & Video Council