Alternating Current
AC circuits, reactance, impedance, resonance and transformers.
1.Introduction to Alternating Current
A simple introduction to AC, how it differs from DC, and why AC is widely used in homes and industries.2.Difference Between AC and DC
Clear explanation of how alternating current differs from direct current in direction, magnitude and applications.3.AC Voltage and Current
Understand how AC voltage and current vary sinusoidally with time and what a sine wave represents.4.Peak, Peak-to-Peak and RMS Values
Learn about peak value, peak-to-peak value and root mean square (RMS) value of alternating current.5.Phase and Phase Difference
Understand phase, phase angles and why phase difference is important in AC circuits.6.Reactance
Simple explanation of inductive and capacitive reactance and how they oppose AC.7.Impedance
Understand impedance as the total opposition offered by an AC circuit containing resistance and reactance.8.AC Through a Resistor
Learn how alternating current behaves when passed through a pure resistor.9.AC Through an Inductor
Understand the behaviour of AC in a pure inductor and the concept of inductive reactance.10.AC Through a Capacitor
Simple explanation of how AC behaves in a capacitor and the idea of capacitive reactance.11.Phasor Diagrams
Beginner-friendly explanation of phasors and how they help visualize AC quantities graphically.12.LCR Series Circuit
Understand the behaviour of series LCR circuits including impedance and phase angle.13.Resonance in AC Circuits
Learn what resonance is and why it occurs in LCR circuits at a specific frequency.14.Power in AC Circuits
Understand real, reactive and apparent power and the concept of power factor.15.Transformers
Simple explanation of how transformers step voltage up or down using electromagnetic induction.16.Applications of AC
Everyday uses of alternating current in homes, industries, motors, generators and transmission systems.