The Principles of Alternate-Current Working
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and current in a circuit follow the simple harmonic law, then the power is equal to half the product of the maxima values of these quantities, multiplied by the cosine of the angle of lag.
62. The component of the current which is in quadrature with the E.M.F. is, as we have seen (Art. 61, Prop. II.), a current which does no work in the circuit ; it is concerned with the periodical storage and discharge of energy which go on in the circuit in consequence of its inductance. If in Eig. 49 the cur...ve A L M E represent the E.M.F. wave, and E B S D T that component of the current wave which is in quadrature with the E.M.F., then the dotted curve will be the power curve corresponding to that com- ponent, and the resultant power is nothing. For this reason, the component of the current which is in ■quadrature with the E.M.F. is sometimes termed the ddle or wattless current.
The other component of the current, being in phase 8 114 THE PBINCIPLBS OF with the E.M.F., is always of the same sign as the^ E.M.P., hence the power due to this component is- always positive.
What to read after The Principles of Alternate-Current Working?
You can find similar books in the "Read Also" column, or choose other free books by Hay, Alfred, 1866- to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
and current in a circuit follow the simple harmonic law, then the power is equal to half the product of the maxima values of these quantities, multiplied by the cosine of the angle of lag.
62. The component of the current which is in quadrature with the E.M.F. is, as we have seen (Art. 61, Prop. II.), a current which does no work in the circuit ; it is concerned with the periodical storage and discharge of energy which go on in the circuit in consequence of its inductance. If in Eig. 49 the cur...ve A L M E represent the E.M.F. wave, and E B S D T that component of the current wave which is in quadrature with the E.M.F., then the dotted curve will be the power curve corresponding to that com- ponent, and the resultant power is nothing. For this reason, the component of the current which is in ■quadrature with the E.M.F. is sometimes termed the ddle or wattless current.
The other component of the current, being in phase 8 114 THE PBINCIPLBS OF with the E.M.F., is always of the same sign as the^ E.M.P., hence the power due to this component is- always positive.
What to read after The Principles of Alternate-Current Working?
You can find similar books in the "Read Also" column, or choose other free books by Hay, Alfred, 1866- to read onlineMoreLess
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