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Electrical Engineering Questions and Answers February 02, 2018

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For the beam shown in the figure, replace the distributed loading with an equivalent resultant force, and specify its location on the beam measured from point O. y 4m 6 m 15 kNm X 10 kNm
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Using the constance above, answer the question Joule (J) Calorie (cal) Avogadros number N Coulomb (C) Electron charge Kelvin temperature scale (K) Gas constant (R) Faraday (F) 1 J 1 kg m s 1 cal of heat raises the temperature of 1 g water 1C from 15 to 16C 1 cal 4.184 J N6.023 x 1023 molecules mol 1C charge on 6.241 x 1018 electrons 1.60 x 1019
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What are Lissajous patterns?

How do we measure non-sinusoidal waveforms?

You are designing a microstrip patch antenna for a new communication device. The antenna operates at a specific frequency and needs a well-defined radiation pattern for optimal signal transmission. However, simulations show the current design exhibits a complex, unwanted fractal pattern in its radiation intensity. Your task is to utilize fractal

What are the various components of an iPhone 5 motherboard?

How do we design a high voltage wireless power inverter?

What is the formula for Magnus Effect?

dy Solve 2yydt 2 cost, y(0)1
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Q.8 Explain linear regression with an example. Q.9 How can you differentiate between overfitting and underfitting Elaborate it with an example. Q.10. Differentiate between Overfitting and Underfitting with an example. Q.11 Explain KNN algorithms with the help of suitable examples Q.12 Consider the following dataset and solve the KNN algorithms,
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Q.13 The following data set contains factors that determine whether tennis is Played or not. Using Decision trees, find the Entropy and Information Gain, also suggest the best attribute OUTLOOK and TEMP. Day OUTLOOK TEMP HUMIDITY WIND PLAY Dayl Sunny Hot High Weak No Day2 Sunny Hot High Strong No Day3 Overcast Hot High Weak Yes Day4 Rain Mild High
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Q.15 Build the decision tree for the following dataset Age Competition Type Profit old yes software down old no software down old no hardware down mid yes software down mid yes hardware down mid no hardware up mid no software up new yes software up new no hardware up new no software up
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Q.16. Define Logistic Regression. Explain it with suitable example. Q.17. How are the Support Vector Machine useful for categories the data Q.18. Use Naive Bayes classifier to classify the new instance Outlook Sunny,TempCool, HumidityHigh, WindStrong Day OUTLOOK TEMP HUMIDITY WIND PLAY Day1 Sunny Hot High Weak No Day2 Sunny Hot High Strong No Day3
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Q.19. What Bayes Theorem A box 1 contain 4 white and 6 black puppies, while another Box contains 4 white and 3 Black puppies. One puppy drowns at random from one of the boxes and it is found to be black. Find a probability that it was drawn from Box 1. Q.20. Madhuri is getting married on Friday at an outdoor ceremony in the Rajasthan. In recent
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Q.21. What is Shattering How the VC Dimension work with 3 Data points Q.22. Solve the following problem using PCA Algorithms. 2 3 4 5 6 7 Y 1 5 3 6 Find the Covariance Matrix, Eigen Values, Eigen Vector. Q.23. Use PCA to find the solution. 7 8 X 2.5 0.5 2.2 1.9 3.1 2.3 2 1 1.5 1.1 Y 2.4 0.7 2.9 2.2 3.0 2.7 1.6 1.1 1.6 0.9
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Q.24. Solve the following problem using PCA Algorithms. X1 X2 1.4000 1.6500 1.6000 1.9750 1.4000 1.7750 2.0000 2.5250 3.0000 3.9500 2.1000 3.0750 1.5000 2.0250 2.3000 2.7500 3.2000 4.0500 4.1000 4.8500 Find the Covariance Matrix 1. Eigen Values 2. Eigen Vector
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Q.25. What are different type of clustering Explain with an example all distance measure used in KMeans Algorithm. Q.26. How to implement the KMean clustering Explain in details. Q.27. What is a Gaussian Mixture Model (GMM) How to apply GMM to Jumble of unlabelled Images Q.28. Height Weight Tshirt (in CMS) (in kgs) Size 158 58 M 158 59 M 158 63 M
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Explain Ferranti Effect and how to reduce it

EXPLAIN THE EVOLUTION OF ELECTRIC POWER SYSTEMS

Question

Question

Explain the different ways to turn on an SCR.

(a)What is a pn junction How is it formed (b) Sketch the energyband picture for i an intrinsic iintype iii a ptype semiconductor Indicates the positions of the fermi, the donor the acceptor levels. (c) What is meant by rectifier (d) Compare the performance measure of different filters. (e) Why Transistor is called Current Controlled Device
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2.a) Derive an expression for total diode current starting from Boltzmann relationship in terms of the applied voltage. b) The reverse saturation current of a silicon p n function diode at an operating temperature of 270C is 50 nA. Compute the dynamic forward and reverse resistances of the diode for applied voltages of 0.8 V and 0.4 V
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3.a) Explain the operation of silicon pn junction diode and obtain the forward bias and reverse bias Volt Ampere characteristics.,b) Obtain the transition capacitance C of a junction diode at a reverse bias voltage of 12 V if CT of the diode is given as 15 PF at a reverse bias of 8 V. Differentiate between transition and diffusion capacitances.
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5.a) Derive expressions for ripple factor of a Full Wave Rectifier with and without a capacitive filter. b) Compute the average and RMS load currents, TUF of an unfiltered centre tapped Full Wave Rectifier specified below. Input voltage to transformer 220 V50 Hz. Step down ratio of centre tapped transformer 41 (Primary to each section
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7.a) Compare the characteristics of a BJT in CB, CE and CC configurations. b) A Silicon BJT is connected in common Emitter configuration with collector to Base bias. Calculate the base resistance R for the quiescent collector to Emitter voltage, VCE has to be 4 V. Vcc and Rc are given as 2 V and 1 KQ respectively. Assume 100, VBE to be zero
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9.a) Explain how biasing is provided to a transistor through potential divider bias. List the assumptions made. List the need of bias compensation methods. b) An NPN transistor with 50 is used in common Emitter configuration with Vcc 10V and Rc 2.2 KQ. Biasing is done through a 100 KQ resistance from collector to Base. Assuming VBE to be zero
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11.a) Explain the significance of threshold voltage of a MOSFET. Discuss the methods to reduce threshold voltage, VT. b) A FET follows the relation ID IDss1 VGSVp. What are the values of ID and gm for VGS 1.5 V if IDSS and VP are given as 8.4 mA and 3V respectively.
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(a)What do you mean by potential barrier for a pn junction (b)What is the significance of negative resistance of a tunnel diode (c) Define peak inverse voltage (PIV). (d) Explain FWR working principle with circuit and waveforms. (e) What are the three regions of a Transistor (f) What is thermal runway how can it avoided (g)What is faithful
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2. Difference between i) Static and dynamic resistances of a p n diode. ii) Transition and Diffusion capacitances of a p n diode. iii)Volt Ampere characteristics of a single silicon pn diode and two identical silicon p n diodes connected in parallel. iv) Avalanche and zener break down mechanisms,3.a) Define the following terms for a PN diode i)
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5.a) List out the merits and demerits of Bridge type Full Wave rectifiers over centre tapped type Full Wave rectifiers. b) The secondary voltages of a centre tapped transformer are given as 60V0V60V the total resistance of secondary coil and forward diode resistance of each section of transformer secondary is 62 2. Compute the following for a load
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7.a) Describe the functioning of a BJT in common base configuration. b) Determine the collector current of a BJT with both of its junctions reverse biased. Assume Ico 5A, IEO 3.58 A, N 0.98 and any other parameter values as required.,c) How do you identify the region of operation of a BJT to be saturation region from the values of various
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9.a) Define all the four hybrid parameters of a BJT in CE configuration. Draw the circuit and its equivalent circuit. b) The source and load resistances connected to a BJT amplifier in CE configuration are 6800 and 1 KQ respectively. Calculate the voltage gain AV and the input resistance R if the hparameters are listed as he 1.1 k hr 2104 he 50
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(a)What is mean by zener breakdown (b)Explain the effect of temperature on the VI characteristics of pn junction diode (c)What is meant by filter (d)Bridge rectifier is becoming more and more popular, why (e)Write B.J.T specifications (f) Explain how transistor acts as an Amplifier (g)What is meant by stabilization (h)What is thermal runway How
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2.a) Explain the concept of diode capacitance. Derive expression for transition capacitance b) Find the value of D.C. resistance and A.C resistance of a Germanium junction diode at 25C with reverse saturation current, I 25A and at an applied voltage of 0.2V across the diode. OR 3.a) What do you understand by depletion region at pn junction What is
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7.a) With neat sketches and necessary waveforms, explain the input and output characteristics of a BJT in CE configuration. Also derive expression for output current. b) Calculate the collector current and emitter current for a transistor with a 0.99 and ICBO 50A when the base current is 20A. 8.a) Explain the basic requirements of transistor
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1. Answer all the following questions a) What is diode equation b) Draw the vI characteristics of SCR define all related terms. (2M) (3M) c) What is the purpose of bleeder resistance in a rectifier circuit using LC filter (2M) d) Write short note on Full wave rectifier (FWR) along with input output waveforms. (3M) e) Why hybrid parameters are
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2.a) Explain about various current components in a forward biased pn junction diode. b) With neat sketches and necessary waveforms explain about the regulation characteristics OR 3.a) With neat sketches and necessary waveforms explain the volt ampere characteristics of PN diode. b) Explain the temperature dependence of VI characteristics of PN
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7.a) With the help of a neat diagram explain different current components in an NPN bipolar junction transistor. b) With reference to bipolar junction transistors, define the following terms and explain. i) Emitter efficiency. ii) Base Transportation factor. iii) Large signal 8.a) Explain how ICO variations are compensated with the help of diode
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11.a) With neat sketches, necessary equations explain the drain transfer characteristics of MOSFET in enhancement mode. b) Why is a Field Effect Transistor called unipolar voltage controlled device Explain the drain transfer characteristics of a JFET in detail.
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1.Answer all the following questions a) What is dark current of a photo diode b) Which type of diode capacitance is used in the varactor diode, explain. c) What is Diffusion and Drift Currents d) Derive ripple factor of FWR. e) What is a dc power supply (Regulated power supply) f) Draw the characteristics of Photo Diode. g) Define reverse leakage
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1 a) Explain the formation of depletion region in an open circuited pn junction with neat Sketches. b) The voltage across a silicon diode at room temperature of 3000K is 0.7V when 2mA Current flows through it. If the voltage increases to 0.75V, calculate the diode current. (OR) 3. Discuss the constructional details of SCR and Schotky barrier
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(a)What is thermal runaway in transistors Obtain the condition for thermal stability in transistors. b) Design a self bias circuit using silicon transistor to achieve a stability factor of 10, with the following specifications V 16V, V 0.7V, V 8V, I 4 mA B 50. CC BE CEQ CQ 5. a) Write the expressions for midfrequency gain of a FET Common
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1. Determine current in 5ohm resistor by any one method. 8 V A 12 V 10 V B 20 i wwww 30 www C 50,2. Determine the voltages 1 and 2 of the network in Fig. by nodal analysis. 3 1 2 www wwww 202 1 A wwww 202 www 2 A
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3. For the circuit shown in Fig, find VCE and VAG. 20 V www 5 10 V E 40 V ww ww H,5. Use nodal analysis to determine the voltage across 5 ohm resistance and the current in the 12 V source. 9A 402 202 B 50 C 4 100 wwww 2012 www.w
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1. State Ohms law. (DEC 14) 2. State Kirchoffs Current law. (MAY 13) 3. State Kirchoffs Voltage law. (MAY 13) 4. An Electric iron is rated 1000W, 240V. Find the current drawn resistance of the heating element.
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Define i) charge ii) electric current iii) power iv) network v) circuit.
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6. Define Node (OR) Junction, Tree branch 7. Write down the expression of equivalent resistance for n number of resistors in series connection. 8. Write down the expression of equivalent resistance for n number of resistors in parallel connection. 9. Write the Algorithm for Nodal Analysis.
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13. Distinguish between a Loop Mesh of a circuit (DEC, 10) 14. State Thevenins theorem. (NOV 14) 15. State Nortons theorem 16. State maximum power transfer theorem. 17. Sate superposition theorem.
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18. State the steps to solve the super position theorem. 19. State the steps to solve the Thevenins Theorem 20. State the steps to solve the Nortons theorem. 21. Write some applications of maximum power transfer theorem.
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Determine current in 5ohm resistor by any one method. 8 V A B 202 10 V www 202 www. www C 202 502 12 V
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Determine the voltages 1 and 2 of the network in Fig. by nodal analysis. 3, 1 www 2 IA www 202 0 www 2 A
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For the circuit shown in Fig, find VCE and VAG 20 V 9 www www E ww JO V 40 V H www
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AN V www im www Fig. 2.12,Determine the current supplied by the battery in the circuit shown in Fig.
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7. For the circuit shown in Fig. 2.135 (a), calculate the current in the 10 ohm resistance. Use Thevenins theorem only. www Hil 12 V www www 20 V (a) 103 OR
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8. State Nortons theorem and find current using Nortons theorem through a load of 8 in the circuit shown in Fig. 2.191(a) 200 V ww www www ww 10 (a) ww 10 www
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9. In the network shown in Fig. 2.231 (a), find the value of R such that maximum possible power will be transferred to RLL. Find also the value of the maximum power and the power supplied by source under these conditions. ww ww R 15 V ww (a)
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10. In the circuit shown in Fig. 2.232 (a) obtain the condition from maximum power transfer to the load RL. Hence determine the maximum power transferred. 10 A 5V 110 (a) www B
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11. Use Superposition theorem to find the voltage V in the network shown in Fig 1040 50 L90 (a)
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1. Define Impedance. 2. Define Resonance. 3. What is a Resonant frequency 4. What is the series resonance 5. What is a parallel resonance
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6. Determine the power factor of a RLC series circuit with R5ohm, XL8ohm and Xc12ohm. 7. What are the three types of power used in AC circuits 8. Define Real power. 9. Define Reactive power. 10. Define Apparent power and Power factor.
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11. What is meant by Complex power 12. What are the advantages of 3 phase circuits over single phase circuits 13. State the relationship between line voltage phase voltage and line current phase current of a 3 phase delta connected system. 14. State the relationship between line voltage phase voltage and line current phase current of a 3 phase
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16.Give some method available for measuring threephase power. 17.A star connected load has 6j8 ohm impedance per phase. Determine the line current if it is connected to 400V, three phase, and 50Hz supply. 18. Define power factor. 19. Explain the concept of balanced load. 20. What is phase sequence
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21. Define Phasor and Phase angle. 22. What are the advantages of 30 system 23. Which type of connection of 30 system is preferred at the point of utilization Why 24. What is house wiring 25. What type of wire is used in a house
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26. Write is meant by industrial wiring 27. What are the materials used for wiring
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1. An alternating voltage is given by V230sin314t.Calculate i)frequency,ii)maximum value,iii)average value,iv)RMS value.(ND2016)
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2. Explain about Single Phase Circuit with relevant diagrams.
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Explain about Star and Delta connected three phase balanced circuits
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Write short notes on RMS Value of AC waveforms.
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5. Calculate the r.m.s. value, the form factor and peak factor of a periodic voltage having the following values for equal time intervals changing suddenly from one value to the next 0, 5, 10, 20, 50, 60, 50, 20, 10, 5, 0, 5,10 V etc. What would be the r.m.s value of sine wave having the same peak value
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6. In a series circuit containing pure resistance and a pure inductance, the current and the voltage are expressed as 1 (f) 5 sm (314 t23) and v(t) 15 sm (31456) (a) What is the impedance of the circuit (b) What is the value of the resistance (c) What is the inductance in henrys (d) What is the average power drawn by the circuit (e) What is the
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7. Write a note on electrical safety
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8. What are the basic concepts of household wiring and explain
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9. Explain the various methods of electrical wiring system.
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Question 1: What is Ohms Law and how is it mathematically represented? Question 2: Explain Kirchhoffs Current Law (KCL) and Kirchhoffs Voltage Law (KVL). Question 3:What is Thevenins Theorem and how is it used in circuit analysis? Question 4: Explain Nortons Theorem. Question 5: Describe the basic operating principle of a transformer.

Question 6:What are the working principles of an induction motor? Question 7: What is power factor and why is it important in power systems? Question 8: What are the primary parameters of a transmission line and their significance? Question 9: What is a PID controller and how does it function? Question 10 : What is Boolean algebra and how is it

Determine Leading or Lagging Power Factor in Python.

a 3 phase induction motor is wound for poles and is supplied from 3 phase 50 Hz system .calculate 1. the synchronous speed,2.speed of the motor when slip is .04 and 3.the rotor frequency when the motor runs at 60rpm

A receiver with a 75- input resistance operates at a temperature of 31C. The received signal is at 89 MHz with a bandwidth of 6 MHz. The received signal voltage of 8.3 V is applied to an amplifier with a noise figure of 2.8 dB. Find (a) the input noise power, (b) the input signal power, (c) S/N, in decibels, (d) the noise factor and S/N of the

(a) State Ohms law and give its limitations. (b) What is the working principle of D.C. motor (c) Define rms, average and form factor of a sinusoidal alternating voltage. (d) Convert (4287) 10 into Hexadecimal number system (e) State Faradays laws of electromagnetic induction. (f) What is the difference between MOSFET and FET (g) What is difference
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Q2. (a) Discuss how do you analyse series RC circuit. Draw its phasor diagram. (b) Explain the working principle and construction of three phase induction motor. Q 3. Discuss construction, working principle, merits and demerits of LVDT. Q4. (a) Give working principle of photo electric transducer. (b) What are flipflops How are inverters used to
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Q5. What is the difference between avalanche and zener breakdown. How does zener diode maintain a constant voltage across the load Q6. A coil of 20 2 resistance and 0.2 H inductance is connected in parallel with a capacitor of 100 uF capacitance. Find the frequency of resonance and the effective impedence at resonance.
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7. Compare electric and magnetic circuits. Establish the relationship between m motive force, magnetic flux and magnetic reluctance. 8. (a) Discuss the RLC parallel resonant circuit. (b) Explain the constructional details and working principle of a DC Generator the internal and external characteristics. 9. (a) Explain the working of a full wave
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Q5. 5. (a) Draw and explain the phasor diagram of RLC series circuit and give the condition for resonance in this circuit. (b) Discuss the working of a full wave rectifier. Q6. Explain the construction and working of JFET. What is the difference between the FET and BJT
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7. (a) Explain the working principle of a transformer and draw a sketch showing parts of a core type transformer. (b) What is MOSFET With the help of a suitable diagram, explain the working of different MOSFET. 8. (a) Define Transducer. How are these classified Give four examples of active transducers. (b) What is Zener Diode Explain its use as
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(a) Write truth table for the RS flipflops and explain the working of RS flipflops. (b) An electrical network is arranged as shown in fig. 1. (i) Find the current in branch AF, (ii) Power absorbed in branch BE and (iii) Potential difference across branch CD. ww 13 24V 102 220 B www 18 11 14 F www 1402 www E 902 D 502
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(a) Define form factor and peak factor. (b) What is piezoelectric transducer Give its advantages and disadvantages. (c) Why cannot a 3 phase induction motor run at synchronous speed (d) State KCL and KVL. Find the current I in the following circuit using KVL. (e) Derive emf equation of a single phase transformer. (f) Explain working of PN junction
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The cast iron beam shown is to be made of ASTM 25. The resultant loads F 3171 lb and F 2(F1) lb are as given. However, resultant load F is spread at a span of 18 inches as shown, while F2 can be assumed as a concentrated load due to a relatively narrow contact. The loads are gradually applied and repeated. Let H 8a and B 5a. What is the

Derivation of voltage equation, power equation and torque equation of a primitive machine in generalized machine theory.

What does RRAM stand for?Where is it used?What are its applications?

Use nodal analysis to find Vo 8 mA ww ww 3 3 2 mA www 2 www 6k02 ww 1 V
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What is RAM as far as telecommunication is concerned?

Consider a512x256?SRAM bank(512?rows and256?columns).?Bit lines are pre-charged to VDD=2.5?V before each read operation. A read operation is complete when the bit line has discharged by0.36?V.?A memory cell can provide an average of0.6?mA of pull-down current to discharge the bit line. Assume the word line resistance is40?ohms per memory cell, the

Design a smart grid system that integrates renewable energy sources, such as solar and wind power, into the traditional electrical grid. Discuss how the system can handle fluctuations in energy generation, ensure grid stability, and optimize energy distribution using advanced control systems, energy storage, and demand response technologies.

io 8.02 www 4 A ww www 202 210 www 42
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7. Write the equation of motion for the following mechanical system and draw the equivalent series and parallel electric circuit analogy. Assume K 5 Nm, fv 1Nsm, and M 1kg. K 0000 fv x(t) M f(t)
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diagram or block diagram for the statement :Derive the control gates for the write input of the memory in the basic computer.(computer system architecture).

Convert the following numbers to binary(up to4?digits of accuracy after the binary point) ?(ABO.C)_16

How do we do remote firmware update on microcontrollers?Explain in brief.

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