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H15 Basics of Electrical and Electronic Engineering Credits: 4:0:0 Program Outcomes addressed a. An ability to apply knowledge of engineering, information technology, mathematics, and science c. An ability to design a system or component, or process to meet stated specifications d. An ability to identify, formulate and solve engineering problems i. An ability to consider social, environmental, economic and ethical impact of engineering activities in a given context. Broad objectives of the course: 1. Students should get an overview of electrical and electronics engineering and their role in the economy and daily life. 2. Students should be able to solve several engineering problems at the systems level (criteria and specifications). 3. Students should find the course enjoyable and feel satisfied that they acquired rudimentary competencies in design of electrical and electronic systems. Methodology of Teaching: Elementary concepts of both electrical and electronic engineering will be presented formally. The course will be presented through a set of case studies without making any attempt to get down to devices and circuits. Theory will covered as required by the case under study. Students will be asked to design one system at the functional level chosen from a list prepared by the faculty member. Electrical Engineering Competencies: At the end of the course the student should be able to 1. Explain the history and nature of electrical energy. 2. Plan electrical utilization for a house, a housing complex, and an office. 3. Compute the performance of a given electrical circuit. 4. Explain the structure of transmission and distribution system and determine its performance. 5. Compare different methods of generating electrical power in given geographic context.

H15 Basics of EEE Assessment Pattern Bloom's Category 1 2 3 4 5 6 Recall Comprehension Application Analysis Synthesis Evaluation Test 1 10 30 30 10 10 10 Test 2 10 30 30 10 10 10 End-semester examination 10 30 30 10 10 10

Learning Objectives Recall 1. List the various developmental activities taken place in electrical engineering from Edison invention. 2. Define the role of Earthing. 3. List the energy efficient lamps. 4. Suggest suitable generators for low head hydro electric power plant and steam power plant. 5. Mention the IS specification for Plate/Pipe earthing system? 6. Define depreciation factor in illumination design? 7. Define utilization factor in illumination design? 8. Why United States of America prefers 110Volt / 60Hz for domestic power supply? 9. Specify the role of lightning arrestors. 10. Mention the advantage of three phase power supply over single phase power supply 11. What are the different types of transformers? 12. Define turns ratio of a Transformer. 13. List different types of motors. Comprehension 1. Specify the electrical safety precautions to be planned in a house / office. 2. Draw the structure of a electric power system. 3. Calculate the capacitance required to improve the power factor from 0.8 lagging to Unity of a 50KW inductive load. 4. Design a circuit to control a device at two different locations. 5. Explain the working principle of Earth leakage circuit breakers. 6. What is meant by grading of Fuse/Miniature Circuit Breakers? 7. Why is transmission of power done at extra high voltage? 8. Mention the various energy conservation techniques that can be used in an office.

H15 Basics of EEE 9. What parts of equipment need to be earthed? 10. Compare the luminous efficiency of various lamps. 11. Explain the operation of a nuclear power plant. 12. Explain the working principle of a transformer. 13. Explain the name plate details of a motor? 14. What is the importance of starters in motors? 15. Explain the operating principle of single phase induction motor. 16. Mention different applications of Transformers? Application 1. Select the MCB rating suitable for a house having a connected load of 5KW. 2. A house has the following loads. Sl.No 1. 2. 3. 4. 5. 6. 7. Device / Equipment Name Fluorescent Lamp Compact Fluorescent Lamp Mixer Grinder 165 Litre Refrigerator Water Pump Ceiling fan 1.5 Ton Air conditioner Wattage 36 11 550 180 750 65 1800 No. of Device/Equipment 10 4 1 1 1 6 1

Calculate the total connected load and select the current rating of a service wire needed for the house availing power supply in single phase 230V 50Hz. 3. Design a lighting layout for a seminar hall having a dimension of 10 meter X 15 meter for an illumination level of 400 Lux. The recommended lamp is 36 watts fluorescent lamp. The depreciation factor is 1.2 and Utilization factor is 0.7. The lumens output of the 36watts fluorescent lamp is 3250 lumens. Also Calculate the number of fittings required. 4. Calculate the energy consumption of the house for a month. The details of the load and operating hours are as follows: Sl. No 1. 2. 3. 4. 5. Device / Equipment Wattage No. of Equipment 750 550 65 40 18 1 1 4 6 3 No. of Hours in Operation per day 1 Hour ½ hour 10 Hours 4 Hours 4 Hours

Name Water Pump Mixer Grinder Ceiling Fan Tube light CFL lamp

H15 Basics of EEE 5. Calculate the reactive power drawn by a 5 HP motor, when loaded 3KW at 0.72 lagging power factor? 6. A transmission line has a resistance of 2 ohms for a length of 32 kilometers. Calculate the loss, when transferring 5MVA power at 11Kilovolts. 7. Draw an electrical power distribution system for an office complex. Evaluation 1. Compare the salient pole alternator with turbo alternator. 2. Compare the different electric power generation systems. 3. Mention the advantages of renewable energy sources when compared with fossil resources? Concept Map:

Course Contents: 1. Characterization of Electrical Power 2. Utilization of Electric Power 2.1 Homes and Offices 2.2 Commercial Services 2.3 Industry 3. Distribution of Electric Power 3.1 HT Power Distribution

H15 Basics of EEE 3.2 LT Power Distribution 4. Transmission of Electric Power 4.1 AC Power Transmission 4.2 DC Power Transmission 5. Generation of Electrical Power 5.1 Generation by Non-renewable Sources 5.1.1 Thermal Power Plants 5.1.2 Nuclear Power Plants 5.2 Generation by Renewable Sources 5.2.1 Hydroelectric Power Plants 5.2.2 Power Generation by Wind Mills 5.2.3 Power Generation by Photovoltaics 6. History of Electric Power Generation and Utilization 7. Utility Services and Regulations 7.1 Organization of Utility Companies around the World 7.2 Regulatory Mechanisms for Power utility Syllabus: Characterization of Electrical Power. Utilization of Electric Power: Homes and Offices, Commercial Services, Industry Distribution of Electric Power: HT Power Distribution, LT Power Distribution Transmission of Electric Power: AC Power Transmission, DC Power Transmission Generation of Electrical Power: Generation by Non-renewable Sources: Thermal Power Plants, Nuclear Power Plants, Generation by Renewable Sources: Hydroelectric Power Plants, Power Generation by Wind Mills: Power Generation by Photovoltaics History of Electric Power Generation and Utilization. Utility Services and Regulations: Organization of Utility Companies around the World, Regulatory Mechanisms for Power utility Reference Books: 1. Hughes E: Electrical Technology, ELBS, 6th edition, 1989 2. Hughes E: Electrical and Electrical Technology ­ELBS ,8th edition, 2002 3. Cotton H: Electrical Technology, Wheeler Publishers,7th edition, 2003 4. D.P. Kothari & I J Nagrath: Basic Electrical Engineering, Tata McGraw Hill, 2nd Edition, 2002 5. Edminister J.A.: Electric Circuit Theory, Schaum Series Outline, McGraw Hill 4th edition, 2004 6. Toro V.D.: Electric Machines & Power Systems, Prentice-Hall,1985 7. Uppal S. L.: Electrical Wiring & Estimating, Khanna Publishers---5th edition, 2003

H15 Basics of EEE

Lecture Schedule No. 1 2. 2.1 2.2 2.3 3. 3.1 3.2 3.3 4. 4.1 4.2 5. 5.1 5.1.1 5.1.2 5.2 5.2.1 6 7 7.1 7.2 Topic Characterization of Electrical Power Utilization of Electric Power Homes and Offices Commercial Services Industry Distribution of Electric Power HT Power Distribution LT Power Distribution Sub-stations and Transformers Transmission of Electric Power AC Power Transmission DC Power Transmission Generation of Electrical Power Generation by Non-renewable Sources Thermal Power Plants Nuclear Power Plants Generation by Renewable Sources Hydroelectric Power Plants History of Electric Power Generation and Utilization Utility Services and Regulations Organization of Utility Companies around the World Regulatory Mechanisms for Power utility 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 2.0 2.0 0.5 1.5 No. of Lectures 2.0

H15 Basics of EEE Electronics Engineering Competencies: At the end of the course the student should be able to 1. Explain how signals that represent physical variables are generated and conditioned. 2. Plan an information processing system for meeting the communication needs of a community, managing the operation of a manufacturing plant, and monitoring the health of dam or bridge. 3. Compute the performance of simple communication systems. 4. Explain the structure of electronic products. 5. Explain the current state of electronic industry. Assessment Pattern Bloom's Category 1 2 3 4 5 6 Recall Comprehension Application Analysis Synthesis Evaluation Test 1 20 30 40 10 0 0 Test 2 10 20 40 20 10 0 End-semester examination 10 20 20 20 20 10

Course Level Learning Objectives: Recall 1. What kind of radiation is used by radio, TV and satellite communication? 2. What is the need for modulation? 3. Describe the basic operation of Digital Multimeter? 4. Describe how signals are processed in a typical satellite electronic system? 5. What is the purpose of filter component used in communication system? 6. Define Sampling Theorem? 7. Describe the characteristics of Signal? 8. Define Noise? Comprehension 1. What is the purpose of signal processor circuit? 2. How do you achieve auto ranging in a DMM? 3. Compare differences and identify commonalities of electromagnetic radiation and human voice? 4. What happens when you combine two sine waves of different frequencies? 5. Differentiate AM and FM?

H15 Basics of EEE 6. A certain frequency modulated is represented by V(t)=10 sin (10t+15 sin 2000t)volts, where t is expressed in seconds. What information would one get from the above relation? 7. Classify the following signals as energy signals or power signals. Also find the normalized energy power of each signal? a) x (t) = A exp (t) elsewhere b) (t)=cos t+3 cos 2t c) x (t) = exp (-2t) t>0, >0 0 -<t< -<t<

8. Classify the following signals as periodic or aperiodic? For those that are periodic find the period (all signals are defined over -<t< )? a. x (t)=cos 2t+ cos 5t b. x (t)=exp(-2t)+ sin 10t c. x (t)=cos 2t+ cos 4t d. x (t)=exp(j2t) 9. If an amplifier has a 30 dB gain, what voltage ratio does the gain represent? 10. An amplifier has an output of 20W. What is the output in dBW? 11. Determine the even and odd parts of the following real sequences: i. a) x(n) = ii. b) u(n) = 3 -4 2 0 6 3 9 5 -2 1 2 5 0 0.1 6 3

12. Determine the output voltage of the DAC, if the digital number is 01110? 13. Why do we use frequency reuse concept in cellular mobile communication? 14. Convert 17 dB into dBM? 15. Classify the following signals as discrete or continuous time signals. Explain your answers? a. Temperature in a room. b. Closing price of a stock on the New York stock exchange. c. Bill for each patron of a grocery store. d. Attendance at New York Yankees home games. e. Barometric pressure at the same location. Application 1. A 10MHz carrier is modulated with a 5 KHz sine wave. What is the Bandwidth of the transmitted AM signal? 2. a) Express the gain of each stage of the TRF receiver in the following figure. Represent the gain in dB and dBm?

H15 Basics of EEE

Pin =10MW

RF Amplifier Gain=18

RF Amplifier Gain=8

Detector Gain=0.7

Audio Amplifier Gain=10

b) What is the advantage of cascading two RF amplifiers? c) What is the total gain in dB? 3. What is the BW requirement to transmit frequency of an FM signal with a modulating 10 KHz and a carrier deviation of 30 KHz?

4. A radio transmission has a power output of Pt = 1W at a frequency of 2.4 GHz. The transmitting and receiving antennas have the gain of 3 and10 respectively. The distance between the transmitter and receiver is 20km. Determine the signal power at the output of the receiving antenna? Represent the power in dBm. 5. Suppose the receiver front end has a noise temperature of 300 OK. Compute the noise power spectral density? 6. Calculate the signal to noise ratio at the receiver output assuming that the BW is 10 MHz? 7. A circuit with a Q of 250 is resonant at 5MHz. What is the BW? 8. A Sinusoidal voltage of amplitude 1KV is amplitude modulated by another sinusoidal voltage to produce 30% modulation. Find the amplitude of each sideband term? 9. A sinusoidal voltage amplitude modulates another sinusoidal voltage of amplitude 1 KV to result in two side band terms of amplitude 200 volts each. Find the modulation index? 10. A 2.5 volts 500 HZ voltage frequency modulates the carrier to cause frequency deviation of 5KHz. Find the modulation index? 11. In Question 10 the modulating voltage is increased to 10 V. What is the modulating index? 12. A Carrier voltage of RMS value 100 V is amplitude modulated by a sinusoidal audio voltage to cause modulation index of 0.2. Calculate the RMS value of carrier on modulation?

H15 Basics of EEE 13. In a frequency modulated voltage, the maximum modulating frequency is 15 KHz and the maximum frequency deviation is 75 KHz of the significant side band pairs extend up to 8th .What is theoretical and Practical bandwidth? 14. When a radio receiver is tuned to 1200 KHz, what is the local oscillator frequency? 15. What should be the transmission bandwidth of an FM signal with 75 KHZ deviation and highest frequency of modulation 15 kHz? 16. Give an appreciation about signal bandwidth requirement for transceivers for land and mobile communication in the 68-88 MHz band, 146-157 MHz band and 460-470MHz band vis-à-vis BW requirement of AM and FM broadcast receivers? 17. The height of the voltage pulses in the following figure is 6v, the width of the pulses is 2ms and the period is 5ms. Calculate the average values of a train of these pulses and also calculate effective value of the pulse train? 18. Find the average and rms value for the waveforms shown in figure. When the signal during one period is: a) y(t)=10 e-200t b) y(t) = 10 sin 10t

y (t)

y (t)

0 0

a) Sin 0.1k b) Cos 10.1 c) Sin 0.1 d) Cos 3 a) Sin 4.2 b) Cos 5.2 c) Sin 100 d) Sin 10k k k/7 k k k k

t

0 0

t

19. Which of the followingsignals are periodic? If any are find the periods?

20. Find the frequencies of the following sequences for T=1?

H15 Basics of EEE e) Sin (-2.1k) f) Cos 2k 21. Which of the signals in Q20 are not periodic? 22. The antenna current of an AM transmitter is 8A when only carrier is sent, but is increased to 8.93A when the carrier is modulated. What is the percentage of the modulation index? 23. An audio signal 15 sin 2 modulation index? 1500t amplitude modulates 60 sin 2 10 3.What is the

24. A radio receiver tuned to 710 kHz and its oscillator frequency is 885 kHz. What would be the image frequency? 25. The intermediate frequency of a super heterodyne receiver is 450 kHz. If it is tuned to 1200 kHz, what would be the image frequency? 26. For an FM wave of carrier 100 MHz, modulating frequency 10 kHz and the maximum frequency deviation of 1MHz.What is the requirement of BW? 27. The figure given below shows part of an FM transmitter. What will be the carrier frequency at point X?

Multiplier × 4 X f = 22.5 MHz f= 18 MHz

Mixer

Oscillator 6MHz

28. What is the channel capacity for a teleprinter channel with a 300Hz bandwidth and a SNR of 3dB? 29. A digital signaling system is required to operate at 9600bps, a) If a signal element encodes a 4 bit word, what is the maximum BW of the channel? b) If a signal element encodes a 8 bit word, What is the maximum BW of the channel? 30. What is the thermal noise level of a channel with a bandwidth of 10 kHz carrying 1000 watts of power operating at 50o C? 31. A telephone line with a BW of 100 KHz is known to have a loss of 20dB.the input signal power is measured as 0.5 watt and the output signal noise level is measured at 2.5 Watt. Using this information calculate the output signal to noise ratio in dB? 32. Determine the wavelength ranges for the frequency bands of a) 30-300 kHz b) 30-3000 kHz

H15 Basics of EEE c) 3-30 MHz d) 30-300 MHz e) 300-3000 MHz f) 3-30 GHz g) 30-300 GHz. 33. Assume that the TV picture is to be transmitted over a channel with 4.5 MHz bandwidth and a 35dB signals to Noise ratio. Find the capacity of the channel(bps)

Signal=100V Noise=10 v Receivers

Signal=2V Noise=0.5v V

34. What is the noise figure? 35. Draw the output waveform for the signal s(t)=sin(2 100t)+sin2 1000t? 36. For a FM transmission with a frequency deviation of 20 KHz. Determine the percent modulation for a commercial FM station. 37. How long it will take for an EM signal to travel the length of a 100 meter transmission line. 38. An FM receiver has Sin/Nin=48 and Sout/Nout=12. Calculate the receiver's noise figure in decibels. 39. Sketch the amplitude spectrum and the PSD of the waveform shown in figure. Include at least 10 harmonics in your plot. 40. An amplitude modulated current is given by i = (10.1+0.4 sin 3140 sin t)(6.28 ×10 5)t. a) What is the modulation index? b) What is carrier frequency? c) What is the RMS value of the carrier current? d) What is the maximum possible band rate of a voice channel having bandwidth of 3100Hz?(AN) 41. Given a channel with an intended capacity of 20 Mbps. The bandwidth of the channel is 3 MHz. What SNR is required in order to achieve this capacity? 42. A carrier with a frequency of 100 KHz is amplitude modulated with the signal X(t) = 10 cos2 ×103 t + 8 cos4 ×103 t + 6 cos 8 ×103 t. List the frequencies appearing at the output of the modulator? 43. The carrier c(t) =Ac Sin 2 fc t is to be amplitude modulated by input m(t) = Am Sin 2 fm. Derive a simplified expression for the modulated signal s(t)? 44. Explain how multiple pairs of earth station within the zone of a single satellite can communicate with each other?

H15 Basics of EEE 45. A periodic band limited signal has only three frequency components: dc,100Hz and 200 Hz, In sin cosine form, X(t) = 12+15 cos 200 t+20 sin 200 t ­ 5 Cos 400 t -12 sin 400 t .Express the signal in amplitude/Phase form? Synthesis Evaluation Concept Map: Electronics

H15 Basics of EEE Course Contents 1. Role of Electronics in lives of People What is electronics? Examples of electronics systems in our lives 2. Signals Signals and their characteristics Signal spectrum Signal sources Analog and Digital Signals Processing of Signals Storing of signals 3. Music System Structure of music systems Performance of music systems 4. Laptop Computers Structure of laptops Performance of laptops 5. Wireless network Structure of wireless networks Performance of wireless networks 6. Structure of electronic products Packaging hierarchy of electronic systems Signal issues related to electronic systems Power supply issues related to electronic systems Thermal issues related to electronic systems 7. Electronic industry Structure of electronics industry Manufacturing of electronic products Syllabus Role of Electronics in lives of People: What is electronics? Examples of electronics systems in our lives Signals: Signals and their characteristics, Signal spectrum, Signal sources, Analog and digital signals, Processing of signals, Storing of signals. Music System: Structure and function of music systems, Performance of music systems. Laptop Computers: Structure of laptops and performance of laptops. Wireless Networks: Structure and function of wireless networks and performance of wireless networks. Structure of Electronic Products: Packaging hierarchy of electronic systems, signal issues, power supply issues, and thermal

H15 Basics of EEE issues. Electronic industry: Structure of electronics industry and manufacturing of electronic products Lecture Schedule No. 1 1.1 1.2 2. 2.1 2.2 2.3 2.4 2.5 2.6 3. 3.1 3.2 4. 4.1 4.2 5 5.1 5.2 6 6.1 6.2 Topic Role of Electronics in Lives of People What is Electronics Examples of Electronics Systems Signals Signals and their characteristics Signal Spectrum Sources of Signals Analog and Digital Signals Processing of Signals Storing and Display of Signals Music System Structure and Function of Music systems Performance of music systems Laptop Computers Structure of Laptops Performance of Laptops Wireless Networks Structure and Function of Wireless Networks Performance of Wireless Networks Structure of Electronic Products and Systems Packaging hierarchy Signal issues 1 1 3 1 2 1 2 1 0.5 0.5 1 1 3 1 0.5 1.5 No. of Lectures

H15 Basics of EEE 6.3 6.4 7 Power Supply Issues Thermal Issues Electronics Industry 1 1 1

H15 Basics of EEE Annexure: Background: Electrical Engineering What is electrical energy? Nature of electrical energy: AC and DC, Voltage, current, resistance, phase, active power and reactive power, energy, frequency: why 50/60 Hz Why is it popular? Can be utilized (illumination, mechanical motion, heat, air conditioning), transformed, and transmitted over long distances more easily. What are its problems: Storage and safety Electrical circuits: Resistance, inductance, capacitance and transformer The discipline of electrical engineering is concerned with Generation (Primary sources of power: hydro, coal, oil, nuclear, solar , wind, and hydrogen) Transmission (transformation from high voltage to low voltage and vice-versa, transmission lines, line losses, high voltage equipment, switch gear) Distribution (transformation, substation, distribution networks, switch gear and metering) Utilization (Illumination: incandescent, FL, CFL and LED; mechanical motion: rotary and linear motion, motors of different kinds, electrical vehicles, lifts, cranes; heating: electric iron, water heating, electric arc furnace, heat treatment of metals; air conditioning and climate control; safety issues: MCBs, fuses, earth leak relays, grounding, lightning arrestors) Energy management History of electrical engineering Organization of electrical utility industry around the world and in India Current technical and policy issues Electronics Engineering Background: Electronics is increasingly playing a dominant role in deciding the quality of life today. It along with software has become the most dominant industry. Electronics deals mainly with information in the form of analog and digital signals. Information is obtained from physical world through signal conditioning the outputs of transducers and processing the resultant electrical signals. Communication systems enable people to connect with another for a variety of transaction, enable us to perform tasks remotely, and entertain in endless number of ways. As this course is common to students of all branches of engineering and is offered at the first semester level, the aim of this course is to give an overview of electronics and communication and explore its relationship to the society and its interdependence with other engineering and economic activities. It should be based on commonly

H15 Basics of EEE encountered electronic systems like TV, cell phone, music systems and computers that students at that age can readily relate to. Course Designers: 1. V. Sarvanan [email protected] (EE) 2. L. Jessy [email protected] (EE) 3. R. A. Alagu Raja [email protected] (ECE) 4. D. Gracia Nirmala Rani [email protected] (ECE)

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