Category: Important question

EC8553 Important Questions DISCRETE TIME SIGNAL PROCESSING

EC8553 Important Questions DISCRETE TIME SIGNAL PROCESSING Regulation 2017 Anna University free download. DISCRETE TIME SIGNAL PROCESSING Important Questions EC8553 pdf free download.

Sample EC8553 Important Questions DISCRETE TIME SIGNAL PROCESSING:

Define unit step function.

Test the causality and stability of ????(????)=sin????(????).

Compare energy and power signal.

Check and explain whether the system ????(????)=????????(????) is linear or not?

Compute the DFT of the sequence ????(????)={1,−1,1,−1}.

Describe about Discrete Fourier Transform. EC8553 Important Questions DISCRETE TIME SIGNAL PROCESSING

Give the time reversal property of DFT.

Explain Parseval’s relation.

State and prove periodicity property of DFT.

Obtain the circular convolution of ????(????)={1,2,1} ; ℎ(????)={1,−2,2}

Discuss about overlap save method. EC8553 Important Questions DISCRETE TIME SIGNAL PROCESSING

What is zero padding? What are its uses?

What is twiddle factor?

Identify the advantages of FFT over DFT.

Outline the concept of bit reversal in FFT?

How many stages of decimations are required in the case of a 64point radix-2 DIT FFT algorithm? EC8553 Important Questions DISCRETE TIME SIGNAL PROCESSING

Estimate the number of multiplications required in the computation of 8-point DFT using FFT.

Point out the usage of in-place computation in FFT?

Draw the basic butterfly diagram of radix-2 DIT FFT.

Write the applications of FFT algorithm.

List the different types of filters based on frequency response.

Write the properties of Butterworth filter.

Compare IIR and FIR filters. EC8553 Important Questions DISCRETE TIME SIGNAL PROCESSING

Why do we go for analog approximation to design a digital filter?

Mention the requirements for the digital filter to be stable and causal.

Justify why impulse invariant method is not preferred in the design of IIR filter other than LPF? EC8553 Important Questions DISCRETE TIME SIGNAL PROCESSING

Subject name	DISCRETE TIME SIGNAL PROCESSING
Short Name	DTSP
Semester	5
Subject Code	EC8553
Regulation	2017 regulation

EC8553 Important Questions DISCRETE TIME SIGNAL PROCESSING Click Here To Download

EC8553 Discrete Time Signal Processing Syllabus

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EC8501 Important 8 mark Questions Digital Communication

EC8501 Important 8 mark Questions Digital Communication Regulation 2017 Anna University free download. Digital Communication Important 8 mark Questions EC8501 pdf free download.

Sample EC8501 Important 8 mark Questions Digital Communication

Enumerate Shannon’s Fano algorithm and Huffman coding with a suitable example.

Five symbols of the alphabet of discrete memory less source and their probabilities are given below, S={S0, S1,S2,S3,S4) P(S)={0.4,0.19,0.16,0.15,0.15}. Predict the symbols using Huffman coding and calculate the average codeword length and efficiency. EC8501 Important 8 mark Questions Digital Communication

Illustrate the following with equations
(i) Uncertainity
(ii) Information
(iii) Entropy and it’s properties

(i) Infer Hamming codes. Analyse the conditions which hamming codes has to satisfy. EC8501 Important 8 mark Questions Digital Communication
(ii) Examine the following terms – Code efficiency, Channel data rate and code rate.

Five symbols of the alphabet of discrete memory less source and their probabilities are given below, S={S0, S1,S2,S3,S4) P(S)={0.4,0.19,0.16,0.15,0.15}. Point out the symbols using Shannon Fano coding and calculate the average codeword length and efficiency

(i) Summarize Source Coding with block diagram and mention it’s functional requirements.
(ii) Deduce the equations for average codeword length and coding efficiency using entropy.

(i) Give the main idea of discrete memoryless channel and it’s matrix form involving transition probabilities.
(ii) Relate the concept of Binary symmetric channel with Binary communication channel & Binary erasure channel EC8501 Important 8 mark Questions Digital Communication

Interpret the following
(i) Mutual information and its properties.
(ii) Channel capacity and it’s equation.

Five symbols of the alphabet of discrete memory less source and their probabilities are given below, S={S0, S1,S2,S3,S4) P(S)={0.4,0.2,0.2,0.1,0.1}. Construct the symbols using Huffman EC8501 Important 8 mark Questions Digital Communication

Subject name	Digital Communication
Short Name	DC
Semester	5
Subject Code	EC8501
Regulation	2017 regulation

EC8501 Important 8 mark Questions Digital Communication Click Here To Download

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EC8501 Important Questions Digital Communication

EC8501 Important Questions Digital Communication Regulation 2017 Anna University free download. Digital Communication Important Questions EC8501 pdf free download.

Sample EC8501 Important Questions Digital Communication

What is entropy and give its mathematical equation.

Define source coding. State the significance of source coding

What is BSC?

Why is Huffman code called as minimum redundancy code?

An event has six possible outcomes with probabilities {1/2, 1/4, 1/8, 1/16, 1/32, 1/32}. Solve for the entropy of the system.

Outline the concept of discrete memoryless source. EC8501 Important Questions Digital Communication

Calculate the amount of information if ????????=1/4.

Identify the properties of entropy

Describe information rate?

Interpret the theory of mutual information

Describe the concept of discrete memoryless channel

List out the properties of Hamming distance. EC8501 Important Questions Digital Communication

Evaluate the Hamming distance between the following code words C1={1,0,0,0,1,1,1} and C2={0,0,0,1,0,1,1}.

State the properties of mutual information

Examine the types of discrete memoryless channel

Give the main idea of Channel Capacity

Summarizeshannon’s law EC8501 Important Questions Digital Communication

Formulate the steps involved in Shannon Fano coding

What is linear predictor? On what basis are predictor coefficients are determined.

Identify the need of prediction filtering.

List the 2 properties of linear prediction.

Summarize the need of Line Codes. EC8501 Important Questions Digital Communication

Why Delta Modulation is superior to Differential Pulse Code Modulation?

Express the data 10011 using the Manchester code format.

Discuss about delta modulation and its limitations.

Demonstrate the techniques to overcome slope overload and granular noise in delta modulation system. EC8501 Important Questions Digital Communication

Subject name	Digital Communication
Short Name	DC
Semester	5
Subject Code	EC8501
Regulation	2017 regulation

EC8501 Important Questions Digital Communication Click Here To Download

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EE8591 Important 8 Mark Questions Digital Signal Processing

EE8591 Important 8 Mark Questions Digital Signal Processing Regulation 2017 Anna University free download. Digital Signal Processing Important 8 Mark Questions EE8591 pdf free download.

Sample EE8591 Important 8 Mark Questions Digital Signal Processing:

(i) Define energy and power signal? Also examine whether the following signals are energy or power or neither energy nor power signals.
(1) x1(n)=(3/2)nu(n)
(2)x2(n)=cos(πn/6+π/3) (ii) Describe the concept of quantization.

A discrete system is characterized by the difference equation
y(n)=x(n)-0.5y(n-1)+0.25x(n-1) EE8591 Important 8 Mark Questions Digital Signal Processing
check the system for (i) Linearity (ii) Causality (iii) Time Invariant (iv) Static and (v) Stability

(i) Demonstrate which of the following systems are stable

(ii) Demonstrate which of the following systems are causal or non causal
(1) y(n)=x(|n|)

(i) What is meant by Nyquist rate? Point out of its significance.
(ii) Explain the classification of discrete signal with an examples
(5)

(i) Given y[n]=x[n2] , Test whether the system is linear, time invariant, memoryless and causal. EE8591 Important 8 Mark Questions Digital Signal Processing
(ii) Test whether the following is an energy signal or power signal.

6.
(i)Explain the process of quantization and its error types.
(ii) Compute the nyquist sampling frequency of the signal x(t) = 4 sin c (3t/Π)

A discrete time systems can be
(i) Static or dynamic
(ii) Linear or non Linear
(iii) Time invariant or time varying
(iv) Stable or unstable
(v) Causal or noncausal
Analyse the following systems with respect to the properties above EE8591 Important 8 Mark Questions Digital Signal Processing
(1)
(2) y(n)=x(n)cos(x(n))

(i) Test the causality and stability of the systems
y(n)=x(-n)+x(n-2)+x(2n-1).
(ii) Test the system for linearity and time invariance
y(n)=(n-1)x2(n)+c.

Demonstrate the response of the following systems to the input signal

Subject name	Digital Signal Processing
Short Name	DSP
Semester	5
Subject Code	EE8591
Regulation	2017 regulation

EE8591 Important 8 Mark Questions Digital Signal Processing Click Here To Download

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EE8591 Digital Signal Processing Question Paper

EE8591 Important Questions Digital Signal Processing

EE8591 Important Questions Digital Signal Processing Regulation 2017 Anna University free download. Digital Signal Processing Important Questions EE8591 pdf free download.

Sample EE8591 Important Questions Digital Signal Processing:

Define the term Nyquist rate.

Discuss about the Shannon’s sampling Theorem

Define aliasing effect.

Distinguish even and odd signals with an example for each.

Given a continuous time signal x(t)=2cos500πt. Evaluate the Nyquist rate and fundamental frequency of the signal?

List the sampling techniques. EE8591 Important Questions Digital Signal Processing

Consider the analog signal
x(t)=3 cos 50πt + 10 sin 300 πt – cos 100 πt. What is the Nyquist rate for this signal?

List any few applications of Digital Signal Processing.

Define spectral density.

Define energy and power signals.

Classify the types of system.

Classify the types of signals.

Define recursive systems. EE8591 Important Questions Digital Signal Processing

Determine the system described by the equation y(n) = nx(n) is linear or not.

Define BIBO stable?

Define static and dynamic systems with an example.

Is the system y(n)=|x(n)| linear and time invariant? Justify your answer.

Distinguish between energy and power signals.

Define unit sample response of a system and state its significance.

Discuss the term quantization and quantization error? EE8591 Important Questions Digital Signal Processing

Define the term ROC of Z- transform? List the properties of Z-transform.

What is the inverse z transform of H(Z)=2Z/(Z-[1/2])?

Calculate the z-transform and ROC for the signal
x(n)= δ(n-k)+ δ(n+k).

List the methods to find inverse Z transform. EE8591 Important Questions Digital Signal Processing

Evaluate the Z-transform of the sequence x(n)= {2,1,-1,0, 3}

Solve the following z- transform of a digital impulse signal and digital step signal.

Subject name	Digital Signal Processing
Short Name	DSP
Semester	5
Subject Code	EE8591
Regulation	2017 regulation

EE8591 Important Questions Digital Signal Processing Click Here To Download

EE8591 Digital Signal Processing Syllabus

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EE8552 Important 8 Mark Questions Power Electronics

EE8552 Important 8 Mark Questions Power Electronics Regulation 2017 Anna University free download. Power Electronics Important 8 Mark Questions EE8552 pdf free download.

Sample EE8552 Important 8 Mark Questions Power Electronics:

Describe the operation of three phase semiconverter with R load and also draw the output voltage waveforms for 30° and 90°. (13)

Explain the operation of a single phase full converter with RLE load using relevant waveforms. obtain the expressions for its average output voltage and RMS value of output voltage . (13)

Analyze the effect of source inductance in the operation
of single phase fully controlled converter with relevant diagram and analysis. (13) EE8552 Important 8 Mark Questions

(i) Discuss the effect of series inductance on the performance of the single phase full converter indicating clearly the conduction of various thyristors during one cycle. (13)

A 230 V ,50 Hz supply is connected to load resistance of
12Ω through half wave controlled rectifier .If the firing angle is 60m degree ,Calculate
(i) Average output voltage (4) (ii) RMS output voltage (3)
(iii)Ratio of rectification and (3) (iv)Transformer utilization factor (3)

Explain the operation of a three phase ,fully controlled
bridge converter with associated waveforms. (13) EE8552 Important 8 Mark Questions

Summarize the operation of single phase two pulse midpoint converter with relevant voltage and current waveforms. (13)

(i) Label the operating principle of single phase dual converter
(7) EE8552 Important 8 Mark Questions
(ii) A single phase full converter is connected with R-load.The source voltage is 230 V 50 Hz.The average load current is 10A For R=20 Ω find the firing angle.

Subject name	POWER ELECTRONICS
Short Name	PE
Semester	5
Subject Code	EE8552
Regulation	2017 regulation

EE8552 Important 8 marks Questions POWER ELECTRONICS Click Here To Download

EE8552 POWER ELECTRONICS Syllabus

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EE8552 Important Questions Power Electronics

EE8552 Important Questions Power Electronics Regulation 2017 Anna University free download. Power Electronics Important Questions EE8552 pdf free download.

Sample EE8552 Important Questions Power Electronics:

1. Define the term pinch off voltage of MOSFET.
2. List the advantages of GTO over SCR.
4. Name the limitation of high frequency operation of a power
Electronic device. EE8552 Important Questions Power Electronics
5. Mention the advantages of ‘RC’ triggering over ‘R’ triggering.
6. Tabulate the various forced commutation techniques used to
turn off SCR.
7. Distinguish between SCR and TRIAC.
8. Predict the secondary breakdown in BJT
9. Discuss reverse recovery time in diodes.
10. Summarize the conditions under which a transistor operates as
a switch. EE8552 Important Questions Power Electronics
11. List any two advantages of TRIAC over SCR.
12. Illustrate the need of snubber circuit.
13. Classify the types of diodes.
14. Compare the merits and demerits of IGBT and MOSFET
15. What is meant by commutation of SCR and list its types.
16. Mention the merits and demerits of GTO.  EE8552 Important Questions Power Electronics
17. Define the term holding current and latching current.
18. Why are IGBT becoming popular in PE based applications?
19. Draw TRIAC characteristics.
20. Why TRIAC is not popular as compared to SCR?

Examine the basic structure of IGBT and Explain its working .Give its equivalent circuit and explain the turn ON and turn OFF processes. EE8552 Important Questions Power Electronics

(i) Analyze the constructional details of an SCR. Sketch its
schematic diagram and explain its operation. EE8552 Important Questions Power Electronics
(ii) Explain turn-ON and turn-OFF characteristics of SCR

Subject name	POWER ELECTRONICS
Short Name	PE
Semester	5
Subject Code	EE8552
Regulation	2017 regulation

EE8552 Important Questions POWER ELECTRONICS Click Here To Download

EE8552 POWER ELECTRONICS Syllabus

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EE8551 Important 8 Mark Questions Microprocessors and Microcontrollers

EE8551 Important 8 Mark Questions Microprocessors and Microcontrollers Regulation 2017 Anna University free download. Microprocessors and Microcontrollers Important 8 Mark Questions EE8551 pdf free download.

Sample EE8551 Important 8 Mark Questions Microprocessors and Microcontrollers

(i) Evaluate the timing diagram of OUT instruction. (8)
(ii) Explain the registers of 8085 microprocessor. (7)

(i)Formulate the timing diagram for LHLD 16-bit address. (8) (ii) Compose the operation of memory mapped I/O and I/O mapped I/O.

Generalize the data transfer concepts of 8085 processor. (15)

Assess the operation of stock with suitable example. (15)

Demonstrate an 8085 program to swap lower and higher nibble of the contents of accumulator.

Classify the addressing modes of 8085 processor.

Discuss the function of CALL instruction.

List different instruction formats. EE8551 Important 8 Mark Questions Microprocessors and Microcontrollers

Tabulate the functions of Rotate instructions? Give example.

Compose the similarity and difference between compare and subtract instructions. EE8551 Important 8 Mark Questions Microprocessors and Microcontrollers

State any four data transfer instruction and its function.

Differentiate CALL instruction from JUMP instruction.

Differentiate MVI and MOV instructions. EE8551 Important 8 Mark Questions Microprocessors and Microcontrollers

If the 8085 adds 87H and 79H, specify the contents of the accumulator and the status of the S,Z and CY flag?

Summarize the function of SIM Instruction in 8085?

(i) Write a 8085 assembly language program to divide a 8 bit number by another 8 bit number and store the remainder and quotient in memory locations 4252 and 4253 respectively. (7) (ii)Demonstrate an assembly language program to generate the square wave form using DAC. Assume the TON=70% (6)

(i)Explain the various arithmetic instructions of 8085 with illustrative examples?
(ii)Write an ALP for 8085 microprocessor to add data stored in memory from 4200H. The firsr element in the location 4200H gives the number of elements in the array. Store the result of the addition in 4300H. Assume the sum does not exceed 16 bits.

Subject name	Microprocessors and Microcontrollers
Short Name	MAM
Semester	5
Subject Code	EE8551
Regulation	2017 regulation

EE8551 Important 8 Mark Questions Microprocessors and Microcontrollers Click Here To Download

EE8551 Microprocessors and Microcontrollers Syllabus

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EE8551 Important Questions Microprocessors and Microcontrollers

EE8551 Important Questions Microprocessors and Microcontrollers Regulation 2017 Anna University free download. Microprocessors and Microcontrollers Important Questions EE8551 pdf free download.

Sample EE8551 Important Questions Microprocessors and Microcontrollers

Describe is the function of program counter in 8085 microprocessor?

Discuss is the use of stack pointer?

Classify the types 8085 flags?

Discover why data bus is bi-directional?

List the registers of 8085 Processor

Mention the uses of ALE in 8085 microprocessor .

List out the machine cycles of 8085 microprocessor.

Define Address Bus and Data Bus. EE8551 Important Questions Microprocessors and Microcontrollers

What is the function of HOLD and HLDA in 8085 microprocessor?

State any four pins of 8085 processor which are used to generate control and status signals

Explain the tri-state logic?

Compare the purpose of SID and SOD lines.

Tabulate the functions of the two status signals S0 and S1 in 8085 Microprocessor. EE8551 Important Questions Microprocessors and Microcontrollers

List out the machine cycle for executing the instruction MVI A,34H

Classify the purpose of timing diagram in 8085 Microprocessor.

Summarize the function of trap interrupt and its significance?

Examine the memory mapping in 8085 Microprocessor.

Demonstrate the significance of tri-state logic?

Compose the function of parity flag and zero flag in 8085?

Discuss about the interrupts 8085 microprocessor. EE8551 Important Questions Microprocessors and Microcontrollers

Explain with a neat block diagram the architecture of 8085 microprocessor.

With a neat block diagram, explain the various functional building blocks of 8085 processor.

Subject name	Microprocessors and Microcontrollers
Short Name	MAM
Semester	5
Subject Code	EE8551
Regulation	2017 regulation

EE8551 Important Questions Microprocessors and Microcontrollers Click Here To Download

EE8551 Microprocessors and Microcontrollers Syllabus

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EE8551 Microprocessors and Microcontrollers Question Paper

EE8501 Important 8 Marks Questions POWER SYSTEM ANALYSIS

EE8501 Important 8 Marks Questions Power System Analysis Regulation 2017 Anna University free download. Power System Analysis Important 8 Marks Questions EE8501 pdf free download.

Sample EE8501 Important 8 Marks Questions Power System Analysis:

(i) The sub transient reactance of a 500MVA, 18kV generator
is 0.25p.u on its rating. It is connected to a network
through a 20/400kV transformer. Find out the sub transient
reactance of the generator on a base of 100MVA and 20kV
(ii) A transformer interconnects a strong 400kV and weaker
200kV system and is provided with a tap changer on the
400 kV side. What is the effect of setting the tap such that
the voltage ratio is 410/200kV on the 400 and 200kV sides
(iii) Draw the pu reactance diagram of a three winding
transformer whose three phase rating are: primary wyegrounded
15MVA,66kV Secondary (S) wyegrounded,
10MVA 13.2 kV tertiary (t) delta connected 5
MVA 2.3 kV. Mark the appropriate value of the impedance
are ZPS=7% ON 15MV;ZPT=9% on 15 MVA and 66KV
ST=8% ON 10MVA and 13.2kV EE8501 Important 8 Marks Questions Power System Analysis

(i)In this line diagram shown in figure each three phase generator G
is rated at 200MVA,13.8kV and has reactance of 0.85p.u and are
generating 1.15pu. Transformer T1 is rated 500MVA,13.5kV/220kV
and has reactance of 0.8%.The transmission line has a reactance of EE8501 Important 8 Marks Questions Power System Analysis
7.8Ω.Transformer T2 has rating of 400MVA,220kV/33kV and a
reactance of 11%.The load is 250MVA at a power factor of
0.85lag.Convert all quantities to a common base of 500MVA and
220kV on the line and draw the circuit diagram with values
expressed in pu EE8501 Important 8 Marks Questions Power System Analysis

Subject name	POWER SYSTEM ANALYSIS
Short Name	PSA
Semester	5
Subject Code	EE8501
Regulation	2017 regulation

EE8501 Important 8 Mark Questions POWER SYSTEM ANALYSIS Click Here To Download

EE8501 POWER SYSTEM ANALYSIS Syllabus

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