1. ELECTRICAL TECHNOLOGY
Electricity is not a fun but easy to learn.

2. Prepared by,
Mr. Vijay Balu Raskar
CHAPTER NUMBER NAME OF CHAPTER
1
D.C. CIRCUITS
2 A.C. FUNDAMENTALS
3 SINGLE PHASE AC CIRCUITS
4 THREE PHASE AC CIRCUITS
5 SINGLE PHASE TRANSFORMERS
6 D.C.MOTORS
7 FRACTIONAL HORSE POWER MOTORS
8 INSTALLATIONS,EARTHING AND TROUBLE SHOOTING
9 DIFFERENT TYPES OF MOTORS

3. 1. D.C. CIRCUITS
• ELECTRIC CURRENT= ?
• 1e = 6.24 X 10^18 ELECTRONS
• VOLTAGE = ?
• RESISTANCE = ?
• DC ? & AC ?

4. OHM’S LAW
• Ohm's law states that the current through a
conductor between two points is
directly proportional to the potential
difference across the two points.
• Resistance is constant.
• V=IR

5. PROBLEM
Q.1 V = 10 Volt, I = 5 Ampere & R = ?
Q.2 R = 3.5 Ohm, I = 0.2 Ampere and
V=?
H.W.
V = 12Volt, R = 7Ohm & I = ?

6. FACTORS GOVERNING THE
RESISTANCE
• 1) Type and Nature of Material: Iron offers high
resistance.
• Copper / Silver is the best conductor.
• Hardness increase the resistance due to heat
treatment.
• 2) Length of the conductor: R directly
proportional to L
• 3) Cross-sectional Area: Inversely proportional to
Resistance
• 4) Temperature: Directly proportional

7. SERIES RESISTANCE

8. PARALLEL RESISTANCE

9. OPEN & SHORT CIRCUIT

10. PROBLEM
• Q.1 Calculate the equivalent of series
resistance or total resistance?
• ANS: Addition of the number.
• Q.2 Calculate the equivalent of parallel
resistance or total resistance?
• ANS: Inversely addition and Inverse of
answer.

11. KIRCHHOFF’S LAW
1)KCL
2)KVL

12. PROBLEMS
•1) Based on KCL
•2) Based on KVL

13. ELECTRICAL NETWORK
based on R, L and C parameters.
1.Linear Circuits- R, L & C = Constant with
V & I.
2.Non-linear Circuits- Vary with V & I
3.Bilateral Circuits- V & I in same direction
of operation like X’mission.
4.Unilateral Circuits- V & I depends on
direction of operation eg Vaccum Diode.
5.Active Network- Having Source
6.Passive Network- Without a Source