This document provides an overview of a lecture on single phase AC circuits. It defines key terms related to alternating quantities like amplitude, time period, frequency, and phasor representation. It also explains AC circuits with pure resistance, inductance and capacitance. The document is presented by a professor from the International Institute of Information Technology in Pune, India. It provides background on the institute, which was established to promote innovation and quality education.

1. Basic Electrical Engineering
UNIT:-IV
Single Phase AC Circuit
Prof. A.B.Kasar
Assistant Professor
Department of Applied Sciences & Engineering
INTERNATIONAL INSTITUTE OF INFORMATION
TECHNOLOGY, PUNE
http://www.isquareit.edu.in/

2. Overview of Presentation
 Definition of Alternating Quantity
 RMS or Effective Value
 Average Value
 Phasor Representation
 AC circuit with a pure resistance
 AC circuit with a pure Inductance
 AC circuit with a pure Capacitance

3. Definition of Alternating Quantity
An alternating quantity changes continuously in magnitude and alternates in
direction at regular intervals of time. Important terms associated with an alternating
quantity are defined below.

4. Important Definations
1. Amplitude
It is the maximum(+ve or -ve) value attained by an alternating quantity. Also
called as maximum or peak value
2. Time Period (T)
It is the Time Taken in seconds required to complete one cycle of an
alternating quantity. Denoted by T
3. Instantaneous Value
It is the value of an alternating quantity at any instant. Instatenios values
denoted by small letters
4. Frequency (f)
It is the number of cycles that occur in one second. The unit for requency is
Hz or cycles/sec.
The relationship between frequency and time period can be derived as
follows.
Time taken to complete f cycles = 1 second
Time taken to complete 1 cycle = 1/f second
T = 1/f

5. Important Definations
5. Angular Frequency (ω)
Angular frequency is defined as the number of radians covered in one
second(ie the angle covered by the rotating coil). The unit of angular
frequency is rad/sec. ω=2πf

6. AVARAGE VALUE

7. AVARAGE VALUE NUMERICAL

8. AVARAGE VALUE NUMERICAL

9. RMS/EFFECTIVE VALUE

10. RMS/EFFECTIVE VALUE NUMERICAL

11. RMS/EFFECTIVE VALUE NUMERICAL

12. FORM & PEAK(CREST) FACTOR

13. Phasor Representation

14. Continue….

15. Continue….

16. Continue….

17. AC circuit with Pure Resistance

18. AC circuit with Pure Resistance

19. AC circuit with Pure Inductance

20. AC circuit with Pure Inductance

21. AC circuit with Pure Inductance

22. AC circuit with Pure Capacitance

23. AC circuit with Pure Capacitance

24. About I²IT
International Institute of Information Technology (I²IT) was
established by Late Shri. P. P. Chhabria, Founder
Chairman of Finolex Group of Industries, a well-known
philanthropist and former President of Mahratta Chamber
of Commerce, Industries and Agriculture (MCCIA).
I²IT has always propagated ‘Innovation and Leadership’ as
their mantra to bring ground-breaking ideas and provide a
rock solid foundation for learning. With the vision and
mission of providing quality education, the Institute is
constructed by world renowned architects with its uniquely
designed dome as its temple of learning.

25. Contact Us
International Institute of Information
Technology (I²IT)
 Address: P-14, Rajiv Gandhi Infotech
Park, Phase – 1, Hinjawadi, Pune –
411057, India
 Phone: +91 20 2293 3441 / 2 / 3
 Email: info@isquareit.edu.in
 Web: www.isquareit.edu.in