Chapter 32
Alternating-Current Circuits
Источники переменного тока
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, ...
Среднеквадратичное значение в цепи переменного тока
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 ...
Резистор в цепи переменного тока
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 ...
Конденсатор в цепи переменного тока
A capacitor is charged by passing an electric current through it, which causes the plates to start accumulating an electrostatic charge. Since the ...
Катушка индуктивности в цепи переменного тока
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) ...
Схемы серии RLC: введение
Consider an RLC series circuit consisting of a resistor, an inductor, and a capacitor connected to an AC voltage source. A current, which varies ...
Схемы серии RLC: импеданс
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 ...
Схема серии RLC: решение проблем
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 ...
Питание в цепи переменного тока
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 ...
Резонанс в цепи переменного тока
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 ...
Трансформаторы
A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or ...
Типы трансформаторов
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 ...
Потери энергии в трансформаторах
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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