Identify at least two electrical products (other than the transformer, motor, generator, and those identified in Section
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Identify at least two electrical products (other than the transformer, motor, generator, and those identified in Section 2.1) that work on Faraday’s law of electromagnetic induction.
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2.1 FARADAY'S LAW AND COIL VOLTAGE EQUATION A coil of N turns linking magnetic flux p coming from an independent external source as shown in Figure 2.1a induces an internal voltage equal to -dp/dt in every turn of the coil. With N turns in series, it adds up to the terminal voltage v=-N x dp/dt. (2.1) The - sign is due to Lenz, which indicates that the polarity of induced voltage and the resulting current in the coil (if in a closed loop) is such as to oppose dep/dt, that is, to oppose any change (increase or decrease) in flux p. Stated differently, the coil current direction will be such as to produce an internal reaction flux p; to counter the flux coming from the external source as shown in Figure 2.1b. Constant flux linkage theorem: A corollary to Faraday's law when applied to a coil with shorted terminals as shown in Figure 2.1b, where the terminal voltage v = 0, leads to -N-d
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Related Book For
Introduction To Electrical Power And Power Electronics
ISBN: 9781466556607
1st Edition
Authors: Mukund R. Patel
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