The book Theory And Calculation of Electric Currents was written by author Jens Lassen La Cour Here you can read free online of Theory And Calculation of Electric Currents book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Theory And Calculation of Electric Currents a good or bad book?
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This serves to concentrate the light coming from the vertical slit d and to produce a sharp point of light at S. R is the rotating mirror driven by the small direct-current motor M. A strip of film can be used instead of the plate to obtain a continuous photograph of the curve. In order to observe the curve continuously, a white plate is fixed at S exactly behind the falling plate. The rays reflected from the small mirrors s lt s 2 and s ? then fall on the white screen, and the wave-shape can b...e observed in the rotating mirror at the same time as the exposure is taken. The Cambridge Scientific Instrument Co. Constructs such an oscillo- graph in which the time of natural vibration of the strip is less than second. THE OSCILLOGRAPH 325 The maximum permissible current for these oscillographs is O'l amp. Usually, however, the desired amplitude of the wave can be obtained with a considerably smaller current. FIG. 287. A further great advantage of the oscillograph is that the shape of curve can be inspected before it is photographed.
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