Alternating Current

&Circuit Analysis

Course Code: PHY123Course Teacher: Ms. Kishwar-E HasinSection:P Depertment:CSE(43 Batch)Group Members: 01.Md. Ashaf Uddaula (161-15-7473)02. Alamin Hossain (161-15-7483)03. Md. Khasrur Rahman (161-15-7214)04. Md. Eram Talukder (161-15-7485)05. Ijaz Ahmed Utsa (161-15-7180)

Going To Tell About…. History of Alternating Current What is Alternating Current?

What things you need to know for analysing current in AC circuit?

Graphical Representation of AC Voltage & Current.

Analysis of AC Circuit Containing Resistance Only. Analysis of AC Circuit Containing Inductor Only.

Analysis of AC Circuit Containing Capacitor Only.

Going To Tell About…. Analysis of AC circuit containing a Resistor & an Inductor in Series.

Analysis of AC circuit containing a Resistor & a Capacitor in Series.

Analysis of AC circuit containing a Resistor, an Inductor & a Capacitor in Series. Role of Alternating Current in Our life.

What is Alternating Current? Alternating current electricity is the type of electricity commonly used in homes and business throughout the world.AC electricity is created by an AC electric generator with determine the frequency.An AC waveform can be sinusoidal , square or sawtooth shaped. Some AC waveform are irregular or complicated.

What things you need to know for analysing current in AC circuit?

Ohm's Law.Basic Concept about Current, Voltage, Induction, Capacitor, Resistance.Faraday's Law.Complex Number.Mathematical Calculation of Integration, Differentiation, Trigonometry.

Graphical Representation of AC Voltage & CurrentIf in a circuit the electric current changes its direction after a definite interval of time with a maximum and minimum value , then this current is called alternating current(I).Consequently ,if in a circuit the electric voltage changes its direction after a definite interval of time with a maximum and minimum value , then this current is called alternating voltage(E).An AC is periodic function of time.Alternating Voltage(E) & current(I) in a circuit is associated with a steady state voltage (E0) and current(I0).These can be written as-

I=I0sinωt E=E0sinωt ;where ω is angular velocity & t is time.

The Graphical Representation:

Analysis of AC Circuit Containing Resistance OnlyConsider, an AC circuit containing a pure resistance R with a voltage E applied on the circuit where E=E0sinωt .This Voltage has an imaginary part. So, the role of complex number in there represent the voltage, E=E0

Then, after calculation we get current, I=I0 Here, I0=E0/R is the peak value of current.

After watching the graphical representation of this circuit ,we can say that, Current & Voltage are in phase.

Analysis of AC Circuit Containing Inductor OnlyConsider, an AC circuit containing an inductor L with a voltage E applied on the circuit where E=E0sinωt .This Voltage has an imaginary part. So, the role of complex number in there represent the voltage, E=E0

Then, after calculation we get current, I=I0

Here, I0 is the peak value of current.After watching the graphical representation of this circuit ,we can say that, Current lags behind the Voltage by π/2.

Analysis of AC Circuit Containing Capacitor OnlyConsider, an AC circuit containing a capacitor C with a voltage E applied on the circuit where E=E0sinωt .This Voltage has an imaginary part. So, the role of complex number in there represent the voltage, E=E0

Then, after calculation we get current, I=I0

Here, I0 is the peak value of current.

After watching the graphical representation of this circuit ,we can say that, Current leads the voltage by π/2.

Analysis of AC circuit containing a Resistor & an Inductor in SeriesConsider, an AC circuit containing a resistor R & an inductor L in series with a voltage E applied on the circuit where E=E0sinωt .This Voltage has an imaginary part. So, the role of complex number in there represent the voltage, E=E0

Then, after calculation we get current, I=I0 Here, 𝜽= & Absolute value of Impedance , |Z|=.Here, I0 is the peak value of current.

After watching the graphical representation of this circuit ,we can say that, Current lags behind the voltage by 𝜽.

Analysis of AC circuit containing a Resistor & a Capacitor in SeriesConsider, an AC circuit containing a resistor R & a capacitor C in series with a voltage E applied on the circuit where E=E0sinωt .This Voltage has an imaginary part. So, the role of complex number in there represent the voltage, E=E0

Then, after calculation we get current, I=I0Here, 𝜽= & Absolute value of Impedance, |Z|=Here, I0 is the peak value of current.

After watching the graphical representation of this circuit ,we can say that, Current leads the Voltage the voltage by 𝜽.

Analysis of AC circuit containing a Resistor, an Inductor & a Capacitor in SeriesConsider, an AC circuit containing a resistor R, an inductor L & a capacitor C in series with a voltage E applied on the circuit where E=E0sinωt .This Voltage has an imaginary part. So, the role of complex number in there represent the voltage, E=E0

Then, after calculation we get current, I=I0 Here, 𝜽= & Absolute value of Impedance , |Z|=.Here, I0 is the peak value of current.

After watching the graphical representation of this circuit ,we can say that, Current lags behind the voltage by 𝜽.

Role of Alternating Current in Our lifeWhat 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. But also, AC can employ capacitors and inductors in electronic circuitry, allowing for a wide range of applicationsAlternating current (AC) electricity is the type of electricity commonly used in homes and businesses throughout the worldThe major advantage that AC electricity has over DC electricity is that AC voltages can be readily transformed to higher or lower voltage levels, while it is difficult to do that with DC voltagesWe commonly use AC electricity to power our television, lights and computers. In AC electricity, the current alternates in direction. AC electricity was proven to be better for supplying electricity than DC, primarily because the voltages can be transformed. AC also allows for other devices to be used, opening a wide range of applications.