### Basic Electrical Engineering

**BASIC ELECTRICAL ENGINEERING**

**EE 401**

Lecture : 3 Year: I

Tutorial: 1 Part: II

Practical: 3/2

**Course Objectives:**After completion of this course the student will understand the fundamental concept of DC, AC & 3-phase electrical circuits.

**1. General Electric System (6 hours)**

1.1. Constituent parts of an electrical system (source, load, communication & control)

1.2. Current flow in a circuit

1.3. Electromotive force and potential difference

1.4. Electrical units

1.5. Ohm’s law

1.6. Resistors, resistivity

1.7. Temperature rise & temperature coefficient of resistance

1.8. Voltage & current sources

**2. DC circuits (4 hours)**

2.1. Series circuits

2.2. Parallel networks

2.3. Kirchhoff's laws

2.4. Power and energy

**3. Network Theorems (12 hours)**

3.1. Application of Kirchhoff's laws in network solution

3.1.1. Nodal Analysis

3.1.2. Mesh analysis

3.2. Star-delta & delta-star transformation

3.3. Superposition theorem

3.4. Thevenin's theorem

3.5. Norton's theorem

3.6. Maximum power transfer theorem

3.7. Reciprocity theorem

**4. Inductance & Capacitance in electric circuits (4 hours)**

4.1. General concept of capacitance

4.1.1. Charge & voltage

4.1.2. Capacitors in series and parallel

4.2. General concept of inductance

4.2.1. Inductive & non-inductive circuits

4.2.2. Inductance in series & parallel

**5. Alternating Quantities**

5.1. AC systems

5.2. Waveform, terms & definitions

5.3. Average and RMS values of current & voltage

5.4. Phasor representation

**6. Single-phase AC Circuits**

6.1. AC in resistive circuits

6.2. Current & voltage in an inductive circuit

6.3. Current and voltage in capacitive circuits

6.4. Concept of complex impedance and admittance

6.5. AC series and parallel circuit

6.6. RL, RC and RLC circuit analysis & phasor representation

**7. Power in AC Circuits**

7.1. Power in resistive circuits

7.2. Power in inductive and capacitive circuits

7.3. Power in circuit with resistance and reactance

7.4. Active and reactive power

7.5. Power factor, its practical importance

7.6. Improvement of power factor

7.7. Measurement of power in a single-phase AC circuits

**8. Three-Phase Circuit Analysis**

8.1. Basic concept & advantage of Three-phase circuit

8.2. Phasor representation of star & delta connection

8.3. Phase and line quantities

8.4. Voltage & current computation in 3-phase balance & unbalanced circuits

8.5. Real and reactive power computation 8.6. Measurements of power & power factor in 3-phase system

**Laboratory works:**

1. Measurement of Voltage, current& power in DC circuit

- Verification of Ohm’s Law
- Temperature effects in Resistance

2. Kirchoff's Voltage & current Law

- Evaluate power from V & I Note loading effects of meter

3. Measurement amplitude, frequency and time with oscilloscope

- Calculate & verify average and RMS value
- Examine phase relation in RL & RC circuit

4. Measurements of alternating quantities

- R, RL, RC circuits with AC excitation
- AC power, power factor, VARs, phasor diagrams

5. Three-phase AC circuits

- Measure currents and voltages in three-phase balanced AC circuits
- Prove Y-Δ transformation
- Exercise on phasor diagrams for three-phase circuits

6. Measurement of Voltage, current& power in a three-phase circuit

- Two-wattmeter method of power measurement in R, RL and RC three phase circuits
- Watts ratio curve

**References:**

1. J.R Cogdell, “ Foundations of Electrical Engineering”, printice Hall, Englewood Chiffs, New Jersy, 1990.

2. I.M Smith,” Haughes Electrical Technology”, Addison-Wesley, ISR Rprint,2000

**Evaluation Scheme:**

Chapters | Hours | Marks |
---|---|---|

1 | 6 | 10 |

2 | 4 | 5 |

3 | 12 | 25 |

4 | 4 | 5 |

5,6 | 2,6 | 15 |

7 | 4 | 10 |

8 | 6 | 10 |

Total | 44 | 80 |

*** There may be minor deviation in marks distribution**

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