ICSE Class 11 Electricity and Electronics | 9. Alternating Current by Pavan | Learn Smarter
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Academics

Grades

Grade 8 Grade 9 Grade 10 Grade 11 Grade 12

Curriculum

CBSE ICSE IB
Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Professional Courses
Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skillsβ€”perfect for learners of all ages.

games
Typing
Memory
Math
English Adventures
Knowledge
9. Alternating Current

Alternating Current (AC) is a type of electric current that periodically reverses direction and is more efficient for long-distance transmission compared to direct current (DC). AC is characterized by frequency, amplitude, and phase, which affect its behavior in circuits with various components such as resistors, inductors, and capacitors. The power in AC circuits relies on the RMS values of voltage and current as well as the power factor, reflecting the phase differences. AC is widely used for generating and transmitting electrical power across long distances, making it indispensable for industrial, commercial, and household applications.

Enroll to start learning

You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take mock test.

Sections

  • 9

    Alternating Current

    Alternating Current (AC) is an electrical current that reverses its direction and magnitude periodically, making it essential for power transmission and household appliances.

    Learning Practice

  • 9.1

    Introduction To Alternating Current (Ac)

    Alternating Current (AC) is an electric current that periodically reverses direction, making it efficient for power transmission.

    Learning Practice

  • 9.2

    Characteristics Of Alternating Current

    This section outlines the fundamental characteristics of alternating current (AC), including frequency, amplitude, period, peak value, and RMS value.

    Learning Practice

  • 9.3

    Ac Waveform And Its Mathematical Representation

    This section introduces the sinusoidal waveform that characterizes alternating current (AC) and explains its mathematical representation.

    Learning Practice

  • 9.4

    Behavior Of Ac In A Resistor, Inductor, And Capacitor

    This section discusses how alternating current (AC) behaves differently when passing through resistors, inductors, and capacitors, highlighting the phase relationships and calculations involved.

    Learning Practice

  • 9.5

    Power In Ac Circuits

    This section focuses on the concepts of instantaneous and average power in AC circuits, including the power factor.

    Learning Practice

  • 9.6

    Generation And Transmission Of Ac

    This section discusses the generation of alternating current (AC) using alternators and the significance of high-voltage transmission lines in reducing energy loss.

    Learning Practice

  • 9.7

    Advantages Of Ac Over Dc

    Alternating Current (AC) has significant advantages over Direct Current (DC) in efficiency, convenience, and generation.

    Learning Practice

  • 9.8

    Conclusion

    This section highlights the importance and characteristics of Alternating Current (AC) in electrical systems and its applications.

    Learning Practice

References

ee11-9.pdf

Class Notes

Memorization

What we have learnt

  • AC is a type of electric cu...
  • The important characteristi...
  • The behavior of AC in diffe...

Final Test

Revision Tests