From Rejection to Acceptance

 
9781234514358: From Rejection to Acceptance
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ... C = capacity = coefficient of energy storage by the voltage, in the dielectric field, and g = conductance = coefficient of power consumption by the voltage, as leakage conductance by the voltage, corona, dielectric hysteresis, etc. Thus the transient of the spontaneous discharge of a condenser would be represented by e = e0e c. (4) Similar single-energy transients may occur in other systems. For instance, the transient by which a water jet approaches constant velocity when falling under gravitation through a resisting medium would have the duration T =-, (5) g where v0 = limiting velocity, g = acceleration of gravity, and would be given by v = V0l-t-r). (6) In a system in which energy can be stored in two different forms, as for instance as magnetic and as dielectric energy in a circuit containing inductance and capacity, in addition to the gradual decrease of stored energy similar to that represented by the single-energy transient, a transfer of energy can occur between its two different forms. Thus, if i = transient current, e = transient voltage (that is, the difference between the respective currents and voltages existing in the circuit as result of the previous circuit condition, and the values which should exist as result of the change of circuit conditions), then the total stored energy is 22' (7) = Wm +Wd. ) While the total energy W decreases by dissipation, Wm may be converted into Wd, or inversely. Such an energy transfer may be periodic, that is, magnetic energy may change to dielectric and then back again; or unidirectional, that is, magnetic energy may change to dielectric (or inversely, dielectric to magnetic), but never change back again; but the energy is dissipated before this. This latter case occurs when the dissipation of energy is very...

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