EC6701 RF AND MICROWAVE ENGINEERING Question Bank

EC6701 RF and microwave engineering Question Bank regulation 2013 anna university free download. RF and microwave engineering EC6701 Question Bank pdf free download.

Sample EC6701 RF and microwave engineering Question Bank:

1. What are the principal limitations of conventional negative grid electron tubes?

1) Electron transit time becomes a noticeable proportion at high frequencies.
2) Lumped electrical reactance and low Q resonant circuit.

2. What is frequency pulling and frequency pushing in magnetrons?

Frequency pulling is caused by changes in the load impedance reflected into the
cavity resonators. Frequency pushing is due to the change in anode voltage which alters the orbital velocity of electron clouds.

3.What are the applications of High Q-oscillators and amplifier circuits?

They are used in a)Low power transmitters
b)Parametric amplifier pumps
c)Police radars and intrusion alarms. (EC6701 RF and microwave engineering question bank)

4.What are the Key phenomenon taking place in TRAPATT diode?

The Key phenomena are a)Carrier generation by impact ionization producing a
current pulse of phase delay of 90 degree.
b)An additional phase shift introduced by the drift of carriers.

5.What is the operating frequency of TRAPATT devices?

TRAPATT devices operate at frequencies from 400 MHz to about 12GHz.

6. What are the applications of TRAPATT devices?

The applications are
a)Phased-array Radar systems
b)Intermediate frequency transmitters.
c)Proxity fuse sources (EC6701 RF and microwave engineering question bank)

7.What are ferrites devices.Explain in detail the different ferrite devices

8. Dicuss the high frequency effects in conventional tubes?

9.Explain in detail about spectrum analyzer?

10.Explain in detail about network analyzer

11.Explain the different types of Impedence measurement methods?

12. How do you measure microwave frequency? (EC6701 RF and microwave engineering question bank)

13. Explain the power measuring devices baretter and thermistor?

14.Explain in detail power detecting elements?

15.Explain in detail about microwave detector? (EC6701 RF and microwave engineering question bank)

16.What is Transferred electron effect?Explian some of the TED‟s?
17.What is negative resistance in gunn diode?Desribe the operation of GUNN
diode

18.Explain the operation of TRAPATT diode (EC6701 RF and microwave engineering question bank)

Subject Name	RF and microwave engineering
Subject code	EC6701
Regulation	2013

EC6701 RF and microwave engineering question bank click here to download

EC6701 RF and microwave engineering Syllabus

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EC6503 Transmission Lines and Wave Guides question bank

EC6503 Transmission Lines and Wave Guides question bank Regulation 2013 Anna University free download. Transmission Lines and Wave Guides EC6503 question bank pdf free download.

Sample EC6503 Transmission Lines and Wave Guides question bank:

1. For a symmetrical network, define propagation constant and characteristic impedance. M-11

2. What are the advantages of m-derived filters? M-11

3. A constant-K T-section high pass filter has a cutoff frequency of 10 KHz. The design impedance is 600 ohms. Determine the value of L. N-10 (ec6503 transmission lines and wave guides question bank)

4. What are the advantages of m-derived filters? N-10 N-09

5. If Zoc =1000Ω and Zsc =360Ω, determine the Zo of the symmetrical network. N-09

6. What are the disadvantages of constant-k prototype filter section? M-09 (ec6503 transmission lines and wave guides question bank)

7. Find L and C of a low pass T section constant-k filter having a cutoff frequency of 1.8KHz and load of 500ohms. M-09

8. What are the demerits of constant k filters? N-08

9. Design a prototype low pass filter T section of design impedance Ro =500Ω and cutoff frequency fc=2000Hz N-08

10. Compare constant K and m-derived filters. M-08 (ec6503 transmission lines and wave guides question bank)

11. Determine the value of C required by a prototype high pass T-section filter having a cutoff frequency of 1KHz to work into a 600ohms load resistance.
M-08

12. Draw a simple High-pass filter section and give the values of circuit elements. N-07

13. Draw a simple Band-pass filter network and give the values of circuit elements. N-07

14. What are called cut-off frequencies in the design of filters? M-07 (ec6503 transmission lines and wave guides question bank)

15. What is constant-K filters? M-07

16. What are the properties of band elimination filter? M-07

17. How the resonant frequency is chosen in the m-derived high pass filters? M 07

18. What is constant-k network? N-06

19. How to obtain constant-k high pass filter? N-06

20. Define characteristics impedance of a network. M-06

21. Define constant-k filters. M-06

22. Why constant K filters are also known as prototype filters? N-05 (ec6503 transmission lines and wave guides question bank)

23. Define cutoff frequency N-05

24. A T section low pass filter has series inductance of 80mH and shunt capacitance of 0.022 μF. Determine the cutoff frequency and the nominal impedance. M-05

25. What are called constants K filters and what are the demerits? M-05

26. What are the characteristics of an ideal filter? N-04

27. Why m-derived filter of L-sections are used as terminations of composite filters? N-04

28. What are the merits of m derived filters? M-04

29. Define neper. What is its relation with Decibels? (ec6503 transmission lines and wave guides question bank)

Subject Name	Transmission Lines and Wave Guides
Subject Code	EC6503
Regulation	2013

EC6503 Transmission Lines and Wave Guides Question Bank click here to download

EC6503 Transmission Lines and Wave Guides Syllabus

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EC6502 Principles of Digital Signal Processing question bank

EC6502 Principles of Digital Signal Processing question bank Regulation 2013 Anna University free download. Principles of Digital Signal Processing EC6502 question bank pdf free download

Sample EC6502 Principles of Digital Signal Processing question bank:

Part A 2 marks

1. Obtain the circular convolution of the following sequences x(n) = {1,2,1}; h(n) = {1, -2, 2}

2. How many multiplications and additions are required to compute N –point DFT using radix – 2 FFT?

3. Define DFT and IDFT?

4. State the advantages of FFT over DFTs?

5. What is meant by bit reversal? (ec6502 principles of digital signal processing question bank)

6. Distinguish between DFT and DTFT?

7. What is zero padding? What are its uses?

8. Determine the number of multiplications required in the computation of 8 – point DFT using FFT?

9. What is twiddle factor?

10. How many stages of decimations are required in the case of a 64 point radix 2 DIT FFT algorithm?

11. Find the 4 – point DFT sequence x(n) = {1, 1, -1, -1}.

12. What is meant by in – place computation? (ec6502 principles of digital signal processing question bank)

13. What are the differences and similarities between DIT and DIF.

14. Distinguish between linear convolution and circular convolution?

15. What are the differences between Overlap – add and Overlap – save method?

16. State the properties of DFT?

17. Draw the basic butterfly diagram for the computation in the decimation in frequency FFT algorithm and explain?

18. How will you perform linear convolution using circular convolution?

19. Find the circular convolution of x(n) = {1,2,3,4} with h(n) = {1,1,2,2}?

20. State Parseval’s relation with respect to DFT? (ec6502 principles of digital signal processing question bank)

PART – B 16 marks EC6502 Principles of Digital Signal Processing question bank

1. (i) Compute the eight point DFT of the sequence by using the DIF – FFT algorithm.
(ii) Summarize the properties of DFT

2. Explain the Overlap add and Overlap save method

3. (i) Compute the eight point DFT of the sequence
Using radix – 2 DIT algorithm.
(ii) Explain Overlap add method for linear FIR filtering of a long sequence.

Subject Name	Principles of Digital Signal Processing
Subject Code	EC6502
Regulation	2013

EC6502 Principles of Digital Signal Processing question bank click here to download

EC6502 Principles of Digital Signal Processing Syllabus

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EC6501 Digital Communication Question Bank

EC6501 Digital Communication Question Bank regulation 2013 Anna University free download. Digital Communication EC6501 Question Bank pdf free download.

Sample EC6501 Digital Communication Question Bank:

Part A 2 Marks

1. State sampling theorem for low pass signals..

2. Compare uniform and non-uniform quantization.

3. Why is pre-filtering done before sampling?

4. What is natural sampling and flat-top sampling?

5. List out the components required for signal reconstruction

6. Define the term aliasing. (EC6501 Digital Communication question bank)

7. Compare DM and PCM.

8. What is meant by quantization?

9. What is the need for non-uniform quantization?

10. State any two non-uniform quantization rules.

11. Define quantization noise power. (EC6501 Digital Communication question bank)

12. Define Nyquist rate and Nyquist interval.

13. A signal is sampled at Nyquist rate of 8 KHz and is quantized using 8 bit
uniform quantizer. Assuming SNR for a sinusoidal signal, calculate the bit
rate, SNR and BW.

14. What is Companding?

15. Write μ-law of compression.

16. What is TDM? (EC6501 Digital Communication question bank)

17. Draw the block diagram of TDM.

18. What is the need for synchronization in TDM?

19. Define PAM

20. Write the advantages and disadvantages of TDM.

PART-B 16 Marks (EC6501 Digital Communication question bank)

1. State the sampling theorem. Explain the ideal sampling process with necessary
expressions and diagrams. (16)

2. Explain
(i) Natural Sampling and Flat-top Sampling (10)
(ii) Sample and Hold circuit. (6)

3. The signal g(t) = 10 cos(20πt) cos(200πt) is sampled at the rate of 250 samples per second. (EC6501 Digital Communication question bank)

(a) Determine the spectrum of the resulting sampled signal.

(b) Specify the cut-off frequency of the ideal reconstruction filter so as to recover
g(t) from its sampled version.

(c) What is the Nyquist rate for g(t). (EC6501 Digital Communication question bank)

(d) Explain the reconstruction process of a message from its samples. (16)

4. Explain the process of quantization and obtain an expression for signal to
Quantization ratio in the case of a uniform quantizer. (16)

5. Explain the characteristics of Non-uniform quantization with diagrams.
Also compare uniform and non-uniform quantization methods. (16)

6. Briefly discuss about quadrature sampling of band-pass signals. Derive the
expression for SDR. (16)

7. Write short notes on (EC6501 question bank)

(i) Analog companding and (8)
(ii) Digital companding. (8)

8. With neat diagrams, Pulse Code Modulation and demodulation system.(16)

9. A compact disc (CD) records audio signals digitally using PCM. Assume the
audio signal bandwidth to be 15 KHz. (a) What is the Nyquist rate?

(EC6501 Digital Communication question bank)

Subject Name	Digital Communication
Subject Code	EC6501
Regulation	2013

EC6501 Digital Communication question bank click here to download

EC6501 Digital Communication Syllabus

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EC6304 Electronic Circuits 1 Question Bank

EC6304 Electronic Circuits 1 Question Bank Regulation 2013 Anna University free download. Electronic Circuits 1 Question Bank EC6304 pdf free download.

Sample EC6304 Electronic Circuits 1 Question Bank:

PART –A (2 mark questions)

1. Why do we choose Q point at the center of the load line?

2. Name the two techniques used in the stability of the q point .explain.

3. Give the expression for stability factor.

4. List out the different types of biasing. (ec6304 electronic circuits 1 question bank)

5. What do you meant by thermal runway?

6. Why the transistor is called a current controlled device?

7. Define current amplification factor?

8. What are the requirements for biasing circuits?

9. When does a transistor act as a switch? (ec6304 electronic circuits 1 question bank)

10. What is biasing?

11. What is operating point?

12. What is stability factor?

13. What is DC load line?

14. What are the advantages of fixed bias circuit?

15. Explain about the various regions in a transistor? (ec6304 electronic circuits 1 question bank)

16. Explain about the characteristics of a transistor?

17. What is the necessary of the coupling capacitor?

18. What is reverse saturation current? (ec6304 electronic circuits 1 question bank)

19. Why is the operating point selected at the Centre of the active region?

20. What are the basic rules of an operating amplifier?

Part B 16 Mark questions

1. Explain the voltage divider bias method & derive an expression for stability factors.

2. Why biasing is necessary in BJT amplifier? Explain the concept of DC & AC load line with neat diagram. How will you select the operating point, explain it using CE amplifier characteristics?

3. Explain the collector feedback bias amplifier & derive an expression for stability factors. (ec6304 electronic circuits 1 question bank)

4. Explain the fixed bias method & derive an expression for stability factors.

5. Derive an expression for all stability factors & CE configuration S equation.

6. Explain about common source self- bias & voltage divider bias for FET.

7. Explain in details about biasing MOSFET.

8. Discuss the various types of bias compensation.

9. The fixed bias circuit as shown in figure is subjected to an increase in junction temperature from 25oC to 75oC. If β is 125 at 75oC. Determine the percentage change in Q point values (Vce, Ic) over temperature change. Neglect any change in VBE. (ec6304 electronic circuits 1 question bank)

Subject Name	Electronic Circuits 1
Subject Code	EC6304
Regulation	2013

EC6304 Electronic Circuits 1 Question Bank click here to download

EC6304 Electronic Circuits 1 Syllabus

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EC6303 Signals and Systems Question Bank

EC6303 Signals and Systems Question bank Regulation 2013 Anna University free download. Signals and Systems EC6303 Question bank pdf free download.

Sample EC6303 Signals and Systems Question bank:

PART- A 2 mark questions

1. Obtain Fourier Series Coefficients for ?(?) = ????0?
2. Give Synthesis and Analysis Equation of Continuous time Fourier Transform.
3. Define ROC of the Laplace Transform. (ec6303 signals and systems question bank)
4. State Initial and Final value Theorem of Laplace Transforms.
5. Find the Laplace Transform of the signal(?) = ?−???(?).
6. State Convolution property of Fourier Transform.
7. Give the Relationship between Laplace Transform and Fourier Transform.
8. What are the Transfer functions of the following?
a) An ideal integrator
b) An ideal delay of T seconds.
9. Write the Nth order differential equation.
10. What are the Dirichlet’s conditions of Fourier series? (ec6303 signals and systems question bank)
11. What is the condition for Laplace transform to exist.
12. Write the equations for trigonometric & exponential Fourier series .

PART – B 16 mark questions (ec6303 signals and systems question bank)

1. i). Distinguish between Fourier series Analysis and Fourier Transforms
ii. Obtain Fourier series of half wave Rectified Sine wave.

2. i). Determine the Fourier Transform for double exponential pulse whose function is given by (?) = ?−2|?|. Also draw its magnitude and phase spectra. ii). Obtain inverse Laplace Transform of the function

3. i). Find the Laplace Transform and ROC of the signal (?) = ?−???(?) + ?−???(?)
ii). State and Prove Convolution property and parseval’s relation of Fourier series

4. i). Find the trigonometric Fourier series for the periodic signal (?) shown in the fig. ii. State and prove Parseval’s Relation of Fourier Transform. (ec6303 signals and systems question bank)

5. i). Find the Laplace Transform of the following. a) ?(?) = ?(? − 2)
b) (?) = ?2?−2??(?)
ii) Find the Fourier Transform of Rectangular pulse. Sketch the signal and Fourier
transform.

Subject Name	Signals and Systems
Subject Code	EC6303
Regulation	2013

EC6303 Signals and Systems Question Bank click here to download

EC6303 Signals and Systems Syllabus

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EC6302 Digital Electronics Question Bank

EC6302 Digital Electronics Question Bank Regulation 2013 Anna University free download. Digital Electronics EC6302 Question Bank pdf free download.

Sample EC6302 Digital Electronics Question Bank:

Part – A  2 mark

1. Apply De-Morgan’s theorem to simplify A+BC.

2. Define the term prime implicants and Essential prime implicants.

3. Draw the XOR logic using only NAND gates.

4. Implement the following Boolean function with NOR – NOR logic
F = Π(0,2, 4,5,6)

5. Express the switching function f (ABC) = B in terms of minterm. (EC6302 Digital Electronics Question Bank)

6. Define minterm & Maxterm. Give examples.

7. Simplify the given Boolean Expression F= x’+xy+xz’+xy’z’.

8. Prove that the logical sum of all minterms of a Boolean function of 2 variables is 1.

9. Show that a positive logic NAND gate is a negative logic NOR gate.

10. If A & B are Boolean variables and if A=1 & A+B=0, Find B? (EC6302 Digital Electronics Question Bank)

11. Realize F = A’B+AB’ using minimum universal gates.

12. Write the Boolean expression for the output of the system shown in figure.

13. Write down fan-in & fan-out of a standard TTL IC.

14. Prove that AB+A’C+BC = AB + A’C

15. Implement the following Boolean function with NAND – NAND logic
F = Σ(0,1, 3, 5) (EC6302 Digital Electronics Question Bank)

16. What are don’t care terms?

17. What are universal gates implement AND gate using any one universal gate?

18. What are the advantages of Schottky TTL family?

19. Define the term (i). Propagation delay (ii). Power dissipation

20. Draw an active high tri-state Gate & write its truth table. (EC6302 Digital Electronics Question Bank)

Part – B 16 mark

1. a). i). Simplify the following function using K – map, f=ABCD+AB’C’D’+AB’C+AB &
realize the SOP using only NAND gates and POS using only NOR gates (12)
ii). Simplify the logic circuit shown in figure (4)

2. a). i). Minimize the term using Quine McCluskey method & verify the result using Kmap
method πM(0,1,4,11,13,15)+ πd(5,7,8). (10)
ii). Explain the operation of 3 input TTL NAND gate with required diagram & truth
table. (6)

3. a). i). Using K-map method, Simplify the following Boolean function and obtain
(a) minimal SOP and
(b) minimal POS expression & realize using only NAND and NOR gates
F=Σm(0,2,3,6,7) + d(8,10,11,15) (10)
ii). Draw the circuits of 2 input NAND & 2 input NOR gate using CMOS (6) (EC6302 Digital Electronics Question Bank)

Subject Name	Digital Electronics
Subject Code	EC6302
Regulation	2013

EC6302 Digital Electronics Question Bank click here to download

EC6302 Digital Electronics Syllabus

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EC6302 Digital Electronics Notes

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EC6302 Digital Electronics Important questions

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EC6301 Object Oriented Programming and Data Structures Question Bank

EC6301 Object Oriented Programming and Data Structures Question Bank Regulation 2013 Anna University free download. Object Oriented Programming and Data Structures EC6301 Question Bank pdf free download.

Sample EC6301 Object Oriented Programming and Data Structures Question Bank:

PART A 2 marks

1. What are the features of Object Oriented P rogramming?

2. List out some of the benefits of OOP.

3. What is the use of scope resolution operator?

4. List out the advantages of new operator over malloc ().

5. What are the control structures used in C++? (ec6301 object oriented programming and data structures question bank)

6. State the difference between structures and class.

7. Define a class.

8. List the access modes used within a class.

9. What are the characteristics of member functions?

10. What are the properties of a static data member? (ec6301 object oriented programming and data structures question bank)

11. What are the properties of a static member function?

12. How can objects be used as function arguments?

13. Define friend function?

14. Define Constructor.

15. List some of the special cha racteristics of constructor. (ec6301 object oriented programming and data structures question bank)

16. Give the various types of constructors.

17. What are the ways in which a constructor can be called?

18. Define Destructor.

19. Give the general form of an operator function.

20. What are the types of type conversions?

PART B 16 marks (ec6301 object oriented programming and data structures question bank)

1. Explain with the Basic Concepts of object oriented programming.

2. Describe the applications of OOP technology.

3. What is a structure and explain the members of structure with an example program.

4. What is function overloading? Explain with an example program.

5. Briefly explain operator overloading with an example.

6. What is friend function? What is the use of using friend functions in c++?

Subject Name	Object Oriented Programming and Data Structures
Subject Code	EC6301
Regulation	2013

EC6301 Object Oriented Programming and Data Structures Question Bank click here to download

EC6301 Object Oriented Programming and Data Structures Syllabus

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EE6352 Electrical Engineering and Instrumentation Question Bank

EE6352 Electrical Engineering and Instrumentation Question Bank Regulation 2013 Anna University free download. Electrical Engineering and Instrumentation EE6352 Question Bank pdf free download.

Sample EE6352 Electrical Engineering and Instrumentation Question Bank:

1. State Faraday’s law of Electro magnetic induction and Lenz law.

2. Mention the following functions in DC Machine (i) Commutator (ii) Brushes (iii) Yoke (iv) Field coils. (ee6352 electrical engineering and instrumentation question bank)

3. What are the main constructional element of a DC Machine?

4. What is meant by excitation of dc machine? What are the different methods for the excitation of DC Machine?

5. What are the necessary conditions for the generators to be self excited?

6. Mention any 2-popular methods for the speed control of DC Shunt motor.

7. What is meant by motor ? How the Faraday’s Left hand rule is used explain it.

8. Define critical resistance of a dc generator? (ee6352 electrical engineering and instrumentation question bank)

9. List the different method of speed control of DC Shunt motor?

10. In speed control of DC Shunt Motor how the armature control method is distinguished with field control method.

11. What are the different techniques used for the speed control of DC Series Motor? (ee6352 electrical engineering and instrumentation question bank)

12. Write the formulae for voltage equation of a DC Motor.

13. What is meant by armature reaction?

14. Write the formulae for generated emf of a Generator.

15. State two applications of DC shunt motor and series motor.

16. What is the significance of back emf Motor?

17. List the different variable and constant losses in electrical machine.

Subject Name	Electrical Engineering and Instrumentation
Subject Code	EE6352
Regulation	2013

EE6352 Electrical Engineering and Instrumentation Question Bank click here to download

EE6352 Electrical Engineering and Instrumentation Syllabus

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EE6352 Electrical Engineering and Instrumentation Notes

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EE6352 Electrical Engineering and Instrumentation Important questions

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EE6801 Electric Energy Generation Utilization and Conservation Question Bank

EE6801 Electric Energy Generation Utilization and Conservation Question Bank Regulation 2013 Anna University free download. Electric Energy Generation Utilization and Conservation EE6801 Question Bank pdf free download.

Sample EE6801 Question Bank:

1. (i)Describe the series- parallel control of electric traction motor. Also specify the advantages of the above control.(8)  (EE6801 Question Bank)

(ii)A train runs with an average speed of 50 kmph.Distance between stations is 4.5 km. Values of acceleration and retardation are 1.5 kmphs and 1.8 kmphps respectively. Calculate the maximum speed of the train assuming a trapezoidal speed time curve.(8)  (EE6801 Question Bank)

2. (i)Explain the recent trends in electric traction systems(8) (ii).A sub urban electric train has a maximum speed of 65kmph.The schedule speed including a station stop of 30seconds is 43.5kmph.If the acceleration is 1.3kmphps; Identify the value of retardation when the distance between stops is 3km.(8)

3. (i)Explain about the types of supply system used in traction system.(8) (ii) A 250 tonnes train with 10% rotational inertia effect is started with uniform acceleration and reaches a speed of 50 kmphps in 265 seconds on level road. Calculate the specific energy consumption if the journey is to be made
according to trapezoidal speed- time curve. Acceration = 2 kmphps; Tracking retardation = 3 kmphps ; Distance between the stations = 2.4 km ; efficiency = 0.9; Track resistance = 5 kg/tones.(8)  (EE6801 Question Bank)

4. (i)With the aid of transmission of tractive effort, describe the mechanism of train movement.(8) (iiDescribe clearly regenerative braking when used for Dc series traction motors. Also discuss the requirements for ideal traction.(8)

5. (i)A sub urban electric train has a maximum speed of 65kmph.The schedule speed including a station stop of 30seconds is 43.5kmph.If the acceleration is 1.3kmphps; Calculate the value of retardation when the distance between stops is 3km. (8) (ii)Discuss short notes on Trolley bus.(8) (EE6801 Question Bank)

Subject Name	Electric Energy Generation Utilization and Conservation
Subject Code	EE6801
Regulation	2013

EE6801 Electric Energy Generation Utilization and Conservation Question Bank click here to download

EE6801 Syllabus Electric Energy Generation Utilization and Conservation

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EE6801 Notes Electric Energy Generation Utilization and Conservation

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EE6801 Important questions Electric Energy Generation Utilization and Conservation

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