Acoustic Sensing and Probing: Fourth Course of the

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A number have founded successful hi-tech companies. "Studying physics in DCU was a fantastic stepping stone into an exciting future. Is the length of the pedal necessarily the true length of the torque arm in pedaling a bicycle? Find out more about our department in the latest July 2016 newsletter. Note the difference in the apparent location of the object. Used to step up or step down a voltage. 545) Primary Coil The coil of a transformer that carries an alternating current and induces a current in the secondary coil. (p. in which an induced emf opposes any current change in the circuit. 522) Resonance A condition in a circuit when the inductive reactance equals the capacitive reactance and they nullify each other. 535) Capacitive Reactance A measure of the opposition to ac current flow by a capacitor. (p. (p. 525) Transformer A device composed of two coils (primary and secondary) and a magnetic core. (p. (p. (p. changes direction.707 Emax or Emax 1. 524) Rectification The process of changing ac to dc. 545) Capacitance The ratio of the charge on either plate of a capacitor to the potential difference between the plates. (p. 525) Step-Up Transformer A transformer used to increase voltage. 530) Inductor A circuit component.41 I 0. (p.prenhall. (p. 545) Alternating Current A current that flows in one direction in a conductor. 536) Capacitor A circuit component consisting of two parallel plates separated by a thin insulator used to build up and store charge. 524) Step-Down Transformer A transformer used to lower voltage. 544) Apparent Power The product of the effective values of alternating current and voltage. (p.707 Imax or Imax 1. it has more turns in the primary coil. (p. 524) Formulas 19. (p. 518) Instantaneous Voltage The voltage at any instant of time. (p. (p. such as a coil. (p. 518) Amplification The process of increasing the strength of an electronic signal. 544) Rectifier A device that changes ac to dc. (p. 530) Instantaneous Current The current at any instant of time. (p. 533) Inductance A measure of the tendency of a coil of wire to resist a change in the current because the magnetism produced by one part of the coil acts to oppose the change of current in other parts of the coil.

Pages: 500

Publisher: World Scientific Pub Co Inc (April 1992)

ISBN: 9810209126

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