Chapter 32
Alternating-Current Circuits
Fonti CA
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, ...
Valore RMS nel circuito CA
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 ...
Resistore in un circuito CA
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 ...
Condensatore in un circuito CA
A capacitor is charged by passing an electric current through it, which causes the plates to start accumulating an electrostatic charge. Since the ...
Induttore in un circuito CA
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) ...
Circuiti serie RLC: Introduzione
Consider an RLC series circuit consisting of a resistor, an inductor, and a capacitor connected to an AC voltage source. A current, which varies ...
Circuiti serie RLC: impedenza
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 ...
Circuito serie RLC: risoluzione dei problemi
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 ...
Alimentazione in un circuito CA
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 ...
Risonanza in un circuito CA
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 ...
Trasformatori
A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or ...
Tipi di trasformatori
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 ...
Perdite di energia nei trasformatori
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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