Alternating Current

This topic explains how to apply an AC voltage to a resistor and find the value of the current using Kirchhoff’s loop rule. It also discusses the root mean square or effective current and voltage with its value, formula and notation.

This topic deals with the concepts of alternating current. It explains the representation of AC current and voltage by using rotating vectors or phasors with a phase diagram.

This topic explains the results when an AC voltage is applied to an inductor. Magnetisation and demagnetisation are also explained here in detail.

In this topic, we will learn how to apply the AC voltage to a capacitor. It explains the capacitive reactance and amplitude to the current with a phase diagram. It talks about the charging and discharging of the capacitors.

This topic discusses the connection of an AC voltage with a series of LCR circuit shown with the figure. It explains the analytical and phasor-diagram solution. We will also get to learn about resonance and its sharpness with expression.

This topic explains the resonance in series RLC circuit. The quantity that represents the measure of sharpness of resonance is also explained here.

In this topic, we are going to learn about the power factor. It explains the cases of resistive, capacitive, LCR series and power dissipated at resonance in circuits with examples.

This topic deals with the concepts related to alternating current. It explains the arrangement of winding of primary and secondary coils with a transformer. It also discusses the reasons behind small energy loss.