Chapter 32
Alternating-Current Circuits
AC Sources
Direct current is a flow of electric charge in only one direction and has a steady state of constant voltage in the circuit. Rectifiers, batteries, ...
New
RMS Value in AC Circuit
The root mean square (RMS) value is a measure of the effective or average value of an alternating current (AC) waveform. In AC circuits, the voltage or ...
Résistance dans un circuit AC
An alternating emf or voltage source is needed to supply an alternating current (AC) to a circuit. A coil of wire rotating in a magnetic field at a ...
Condensateur dans un circuit AC
A capacitor is charged by passing an electric current through it, which causes the plates to start accumulating an electrostatic charge. Since the ...
Inductance dans un circuit AC
The basic components of an inductor are coils or loops of wire that are either wound around a hollow tube former or a ferromagnetic material (iron-cored) ...
Circuits de la série RLC : Introduction
Consider an RLC series circuit consisting of a resistor, an inductor, and a capacitor connected to an AC voltage source. A current, which varies ...
Circuits de la série RLC : Impédance
When current flow is opposed in a DC or AC circuit, it is referred to as resistance or impedance, respectively. Impedance plays a key role in determining ...
Circuit de la série RLC : résolution de problèmes
Consider an AC generator with a frequency of 50 hertz and a voltage of 120 volts. The AC generator is connected to an RLC series circuit with a 20-ohms ...
Alimentation dans un circuit AC
In a DC circuit, the power consumed is simply the product of the DC voltage times the DC current, given in watts. However, the power consumed for AC ...
Résonance dans un circuit AC
The property of an inductor makes it resist any change in the current passing through it, while the property of a capacitor is to build up the charge ...
Transformateurs
A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or ...
Types de transformateurs
Transformers can provide desired voltages to a circuit by modifying the number of turns in the secondary windings.
If the ratio of the number of turns in ...
Pertes d’énergie dans les transformateurs
In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary ...
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