Chapter 7 – Alternating Current
Chapter 7 – Alternating Current introduces the concept of electric current that periodically reverses direction, commonly used in household and industrial power systems. It explains how alternating voltage and current vary sinusoidally with time, highlighting key terms such as amplitude, frequency, phase, and root mean square (RMS) values. The chapter explores the behavior of AC in different circuit elements like resistors, inductors, and capacitors, and discusses important phenomena such as reactance, impedance, and phase difference. It also covers resonance in AC circuits, power consumption, and the role of transformers in efficient power transmission, making it essential for understanding modern electrical systems and energy distribution. And it is important for Class 12 board exams and competitive exams like NEET and JEE.
Alternating Current NCERT
