**Basic Electrical Engineering (103004)**

Teaching scheme:

Lectures – 3 Hrs./Week

Practicals- 2Hrs./Week

Examination Scheme:

Paper – 50 Marks(2Hrs)

Online-50 Marks

Term work-25 marks

**Course Objective:-**

At the end of this course the student will be able to-

1. Understand and demonstrate the fundamentals of electromagnetism, single phase transformers, electronics, and A.C. and D.C. Circuits.

2. Apply concept of electromagnetism for the working of transformer.

3. Differentiate between electrical and magnetic circuits.

4. Compare between D.C. and A.C. circuits.

5. Draw the phasor diagrams for single phase and three phase A.C. circuits.

6. Provide solution for the network by applying various laws and theorems.

7. Obtain solution for electrical network analytically and verify these results experimentally in laboratory.

8. Demonstrate the awareness on social issues like conservation of electrical energy, electrical safety etc.

9. Develop abilities to excel in competitive exams required for post graduation and research.

**Unit 1. Elementary/Concepts: **(6 Hrs)

Prerequisite: Concepts of emf., p.d. and current, resistance. Ohm’s law, effect of temperature on resistance, resistance temperature coefficient, insulation resistance. S.I. units of work =, power and energy. Conversion of energy from one form to another in electrical, mechanical and thermal systems.

**Unit 2. Electromagnetism:** (6 Hrs)

Magnetic effect of an electric current, cross and dot conventions, right-hand thumb rule and corkscrew rule, nature of magnetic field of long straight conductor, solenoid and toroid. Concept of m.m.f., flux, flux density, reluctance, permeability and field strength, their units and relationships. Simple series and parallel magnetic circuits, comparison of electrical and magnetic circuit, force on current carrying conductors placed in magnetic field, Fleming’s left-hand rule.

Faraday’s laws of electromagnetic induction, Fleming’s right hand rule, statically and dynamically induced e.m.f., self and mutual inductance, coefficient of coupling, energy stored in magnetic field.

**Unit 3. Single phase Transformers and Electrostatics:** (6 hrs)

A) Single phase transformers: Construction, Principle of working. e.m.f. equation, voltage and current ratios, losses, definition of regulation and efficiency, determination fo these by direct loading method. Descriptive treatment of autotransformers.

B) Electrostatics: Electrostatics field, electric flux density, electric field strength, absolute permittivity, relative permittivity, capacitance and capacitor, composite dielectric capacitors, capacitors in series and parallel, energy stored in capacitors, charging and discharging of capacitors (no derivation) and time constant.

**Unit 4: AC fundamentals: **(6 hrs)

Sinusoidal voltages and currents, their mathematical and graphical representation, concept of cycle, period, frequency, instantaneous, peak (maximum), average and r.m.s values, peak factor and form factor. Phase difference, lagging, leading and in phase quantities and phasor representation. Rectangular and polar representation of phasors.

Study of A.C. circuits consisting of pure resistance, pure inductance, pure capacitance and corresponding voltage-current phasor diagrams, voltage-current and power waveforms.

**Unit 5****: Single phase A.C. Circuits and Polyphase A.C. Circuits: **(7 hrs)

A) Single phase A.C. Circuits: Study of series and parallel R-L, R-C, R-L-c circuits, concept of impedance, admittance in case of above combinations, waveform and relevant voltage-current phasor diagrams, concept of active, reactive, apparent, complex power and power factor, resonance in series RLC circuit.

B) Polyphase A.C.Circuits: Concept of three-phase supply and phase sequence, balanced and unbalanced load, voltages, currents and power relations in three phase balanced star-connected loads and delta-connected loads along with phasor diagrams.

**Unit 6: D. C. Circuits: **(6 hrs)

Classification of electrical networks. Kirchhoff’s laws and their applications for network solution using loop analysis, Simplifications of networks using series and parallel combination and star-delta conversions. Energy sources- ideal and practical voltage and current sources. Superposition theorem, Thevenin’s theorem.

**Term work:**

The term work shall consist of record of minimum eight exercises and experiments, out of which Group A is compulsory and any five experiments from Group B should be conducted.

**Group A**

1. Wiring Exercises:

a) Study of various wiring components (wires, switches, fuse, sockets, plugs, lamp holders, lamps etc. their uses and ratings).

b) Control of two lamps from two switches (looping system).

c) Staircase wiring.

d) Use of Megger for insulation test and continuity test of wiring installations and machines.

2. a) Study of fluorescent tube circuit.

b) Study of compact fluorescent lamp(CFL). c) and Light Emitting Diode (LED) lamps.

c) Study of HID lamps such as mercury vapour lamp/sodium vapour lamp.

3. a)Study of safety precautions while working on electric installations and necessity of earthing.

b) Introduction to energy conservation and simple techniques to achieve it.

**Group B**

4. Determination of temperature rise of medium resistance such as shunt field winding.

5. Verification of a) Kirchhoff’s laws and b) Superposition theorem.

6. Verification of Thevenin’s theorem.

7. Study of R. L. C. series resonance circuits.

8. Verification of voltage and current relations in three phase balanced star and delta connected loads.

9. Determination of performance of single phase transformer by direct loading for

a)Voltage and current ratios and b) Efficiency and regulations.

**Text Books :**

1. Principle of Electrical Engineering by Del. Toro, PHI learning Pvt. Ltd.

2. Theory and Problem of Basic Electrical Engineering-I.J. Nagrath and Kothari.

3. Basic Electrical Engineering, V.K.Mehta, S.Chand and Company Ltd. New Delhi.

**Reference Books :**

1. Electrical Technolgy- H.Cotton, C.B.S. Publications.

2. A Textbook of Electrical Technology: Volume J-B.L.Theraja, S. Chand and Company Ltd., New Delhi.

3. Basic Electrical and Electronics Engg. By S K Bhattacharya, Pearson.

4. Electrical Technology-Edward Hughes, Pearson.

**Basic Electronics Engineering (104012)**

Teaching scheme:

Lectures – 3 Hrs./Week

Practicals- 2Hrs./Week

Examination Scheme:

Paper – 50 Marks(2Hrs)

Online Exam 1- 24 Marks

Online Exam 2- 26 Marks

Term work-25 marks

**Course objectives:**

This course is designed to give exposure and knowledge of basic Electronic components and circuits to the First Year Engineering of all branches. The course begins with introduction of basic diodes and transistor based circuits, to the OP-AMP based simple linear applications, power supply ICs, Digital logic circuit and concludes with introduction to industrial Electronics and Electronic communication.

1. To give knowledge of some basic electronics components and circuits.

2. To introduce basic of diode and transistor circuits.

3. To understand working of some IC based circuits.

4. To study logic gates and their usage in digital circuits.

5. To expose the students to working of some power electronic devices, transducers and application of transducers.

6. To introduce basic aspect of electronic communication systems.

7. The associated Laboratory Practical course is designed to understand working of various Electronics Circuits. The students will understand how to use the basic test and measuring instruments to test the circuits.

**Topics:**

**Unit I: Diode Circuits **(6 hrs)

Half-wave rectifiers, Full wave rectifiers, Power supply filters and Capacitor filters, Diode limiting (Clippers) and Clamping circuits, Voltage multipliers, Zener diode and its applications,LEDs and Photodiodes.

**Unit II: Bipolar Junction Transistor (BJT) Circuits **(6 hrs)

BJT Structure and its operation with normal biasing, Transistor characteristics and parameters, DC operating point, Transistor as an amplifier, Transistor as a switch, Enhancement-type MOSFET

**Unit III: Linear Integrated Circuits **(6 hrs)

Introduction to operational amplifiers, Op-amp Input modes and parameters, Negative feedback, Op-amp with negative feedback, Comparators, Summing amplifiers, Integrator and Differentiators, IC 555 timer as an oscillator, Voltage regulation, IC voltage regulators (Three pins).

**Unit IV: Digital Electronics **(6 hrs)

Introduction, Digital signals, Basic digital circuits-AND, OR, NOT, NAND, NOR, EX-OR, Boolean algebra, Examples of IC gates, Standard representation for logic functions, Half adder, Full adder, Multiplexers, De-multiplexer, Flip-flops, 1-bit memory cell, D flip-flop, Shift registers, Counters, Block diagram of Microprocessor and Microcontroller and their applications.

**Unit V: Power devices and Transducers **(7 hrs)

Power Devices: Basics of 4-layer devices: Silicon Controlled Rectifier (SCR), Diac and Triac.

Transducers: Introduction, Electrical Transducer, Selecting a transducer, Resistive transducer, Thermistor, Inductive transducer, Linear variable Differential transducer (LVDT), load cell, Phototransistor, Temperature transducers, Flow measurement (Mechanical transducers) Application of transducers of transducers: Digital Thermometer, Weighing machine(Block diagrams).

**Unit VI: Electronic Communication **(7 hrs)

Importance of Communication System, The elements of Communication System, Bandwidth requirement, IEEE frequency spectrum, Transmission media: Wired (Twisted pair, Coaxial and Optical fiber Cables) and Wireless, Need for modulation, Analog modulation schemes-AM and FM, Mobile communication system: Cellular concept, Simple block diagram of GSM system.

**Text Books:**

1. Floyd,”Electronic Devices and Circuits”, Pearson Education India. (For Unit I,II,III)

2. R.P. Jain. “Modern digital electronics”, 3rd Edition, 12th reprint TMII Publication, 2007. (For Unit IV)

3. H.S. Kalasi “Electronic Instrumentation”, Tata McGraw Hill. (For Unit V)

4. Frenzel,”Communication Electronics-Principles and Application”, TATA McGraw Hill. (For Unit VI)

**Reference Books:**

1. Jacob Milman, C C Halkias, Chetan Parikh,”Integrated Electronic”, Tata McGraw Hill

2. Paul Horowitz, Winfield Hill, “Art of Electronics”, Cambridge Univ Press, Low Price Edition

3. Debashish De, Kamakhya Prasad Ghatak, “Basic Electronics”, Pearson Education.

4. J R Cogdell, “Foundations of Electronics”, Pearson Education.

5. Santiram Kal, “Basic Electronics, Devices, Circuits and IT Fundamentals”

**List of Practicals:**

1. Study of different electronic components.

a) Resistors (Carbon Film, Metal Film, Wire Wound, Variable),

b) Capacitors (Electrolytic, Mica, Ceramic, Variable),

c) Inductors, Transformers,

d) Connectors, Switches

2) Study of different electronic measuring instruments.

a) To study different controls of DMM and measurement of parameters like AC and DC Voltages, current.

b) To study controls of CRO, Measurements of frequency, phase, AC and DC Voltage.

c) To study various controls of a signal generator

3) Study of Regulated power supply.

For a given Regulated Power Supply circuit with bridge Rectifier, Capacitor filter and three terminal regulator.

a) Identify pins of rectifier Diode (such as IN4001) and study of its data sheet specifications.

b) Identify pins of three pin Regulator (such as LM 78XX or LM 79XX) and study of its data sheet specifications.

c) To measure Voltages and observe waveforms at transformer secondary, output of Bridge Rectifier, output of Regulator.

4. Study of Single stage BJT Common Emitter amplifier circuit.

For a given BJT CE Amplifier circuit

a) Identify pins of a BJT (such as BC547) and study of its data sheet specifications.

b) To measure Voltages and observe waveforms at input and terminals of single stage BJT Common Emitter amplifier circuit.

c) Calculate voltage gain of the amplifier.

5. Study of Op-amp based amplifiers circuits.

a) Identify pins of an Opamp (such as LM741)

b) Implement given voltage equation for 2 input with Opamp based Summing and Difference amplifier (such as V_{0}=2V_{1}+3V_{2} and V_{0}=4V_{1}-V_{2})

6. Study of IC 555 Timer circuit.

a) Identify pins of IC 555 Timer

b) Observe output waveforms and measure frequency of output wave of IC 555 Timer used in Astable mode.

7. Study of Digital Circuits.

a) Identify pins of Digital Logic Gates ICs such as AND, OR, NOT, EX-OR, NAND

b) Implement Half and Full Adder circuit with basic logic gate ICs

8. Build and test Simple application circuit

Build and test any circuit using IC such as Opamp LM741, IC 555 Timer, LM78XX / 79XX or any digital logic gate IC.

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