1 edition of Analysis of alternating-current circuits. found in the catalog.
Published 1952 by Administrator in McGraw-Hill
nodata
Statement | McGraw-Hill |
Publishers | McGraw-Hill |
Classifications | |
---|---|
LC Classifications | 1952 |
The Physical Object | |
Pagination | xvi, 86 p. : |
Number of Pages | 47 |
ID Numbers | |
ISBN 10 | nodata |
Series | |
1 | |
2 | McGraw-Hill electrical and electronic engineering series |
3 | |
nodata File Size: 9MB.
An AC voltage of 340 V peak-to-peak is connected to a 10-ohm heater. After watching the graphical representation of this circuit ,we can say that, Current lags behind the voltage by 𝜽. The power factor ranges from —1 to 1. The currents in the primary and secondary windings are related by the number of primary and secondary loops, or turns, in the windings of the transformer. Power plants transmit high voltages at low currents to achieve lower ohmic losses in their many kilometers of transmission lines.
Determine the total resistance of the circuit and the effective value of the current flow. The effective value of the voltage. This is also true in an AC circuit when the current and voltage are in phase; that is, when the circuit is resistive. Theoretically, no AC circuit can contain only resistance.
Plotting all the instantaneous powers, as illustrated in Figure 3, produces a power waveform. From Kirchhoff's rules, the following expressions for the potential difference across the capacitor V C and the current I in the circuit are derived: where V is the potential of the battery. What is special about AC electricity is that the voltage can be readily changed, thus making it more suitable for long-distance transmission than DC electricity.
Resistive loads are characterized by the fact that they Analysis of alternating-current circuits. heat and the current and voltage are in phase with each other. Similarly, when you solve for peak or average values, all values you use must be peak or average values. In transformers, two coils are wired in such a way that when an Alternating current is applied in one, it induces voltage in the other. When the voltage passes Analysis of alternating-current circuits.
zero, the current should stop changing just for an instant. AC also allows for other devices to be used, opening a wide range of applications. When the voltage reaches zero it's gone through a full cycle so it's back to point a again to repeat the cycle. Most present day household and industrial Appliances and systems are powered using alternating current.
A capacitor with a large time constant will change slowly. In general, all the laws and formulas that apply to DC circuits also apply to AC circuits.
AC Circuits AC Circuits 7-23-99 Alternating current Direct current DC circuits involve current flowing in one direction. In part two of this article, we will be discussing AC waveforms and get into some equations and calculations. 208 V and 120 V or 480 V and 277 V•
The reason for this has to do with the law of induction: Applying Kirchoff's loop rule to the circuit above gives: As the voltage from the power source increases from zero, the voltage on the inductor matches it.
If the three-phase system is balanced and resistive, then the two wattmeters will have the same readings, and the total circuit power will be equal to the sum of the two wattmeter readings W 1 and W 2.
The instantaneous voltage across the inductor V Lleads the instantaneous current by 90 degrees.