AC CIRCUITS FIRDIANA SANJAYA ANA ALINA

Resistors in an AC Circuit

Rms current

Resistors in an AC Circuit Rms voltage Power

Inductors in an AC Circuit

Inductive reactance

Capacitors in an AC Circuit

Capacitive reactance

The RLC Series Circuit because the elements are in series, the current everywhere in the circuit must be the same at any instant. the voltage across each element has a different amplitude and phase.

The RLC Series Circuit

An impedance triangle for a series RLC circuit gives the relationship

Resonance in a Series RLC Circuit

The Transformer and Power Transmission AC transformer is a device that can change the alternating voltage and current without causing appreciable changes in the power delivered.

The Transformer and Power Transmission

Rectifiers and Filters The process of converting alternating current to direct current is called rectification, and the converting device is called a rectifier. The most important element in a rectifier circuit is a diode, a circuit element that conducts current in one direction but not the other. The circuit symbol for a diode is, where the arrow indicates the direction of the current in the diode.

Rectifiers and Filters The RC circuit in Figure is one example of a filter circuit, which is used to smooth out or eliminate a time-varying signal. For example, radios are usually powered by a 60-Hz alternating voltage. After rectification, the voltage still contains a small AC component at 60 Hz (sometimes called ripple), which must be filtered. By “filtered,” we mean that the 60-Hz ripple must be reduced to a value much less than that of the audio signal to be amplified, because without filtering, the resulting audio signal includes an annoying hum at 60 Hz

Problem

3.