Richard Dawson was born November 20th 1932.
The Earth inductor compass -LRB- or simply induction compass -RRB- is a compass that determines directions using the principle of electromagnetic induction , with the Earth 's magnetic field acting as the induction field for an electric generator .. compass. compass. electromagnetic induction. electromagnetic induction. induction field. induction field. electric generator. electric generator. The electrical output of the generator will vary depending on its orientation with respect to the Earth 's magnetic field .. This variation in the generated voltage is measured , allowing the Earth inductor compass to determine direction .. compass. compass