notes of alternating current

1. Chapter-7
Alternating Current
AC

2. Alternating current and emf:

3. Root mean square( RMS) value of AC:
1
1

5. Phasor and Phase diagram:
(i)
..........
..........
sin
0 t
I
I 
=
1 of
From figure,

6. A.C. through a resistance:
1
1

7. 1
1
A.C. through an inductance:
1
1

9. 1

10. A.C. through a capacitor:
1
1

11. 1

13. A.C. through an inductor and a resistor in series:
1
1
1

14. 1

15. A.C. through a capacitor and resistor in series:
1
1
1

16. 1

17. A.C. through an inductor, a capacitor and a resistor:
1
1

18. 1

20. Electrical resonance:
1
1

22. Quality factor:

23. Power consumed in a series LCR circuit:

25. Power factor of an a.c. circuit:

26. Wattless and Wattful current:

27. 1.
2.
3.
4.

28. 7.
6.
5.

29. 1.

30. 2.

31. 3.

32. 4.

33. 5.

34. 6.

35. 7.