Solved question paper for BEEE Dec-2005 (B-TECH 1st-2nd)
Solved Question Paper
Basic electrical and electronics engineering Dec-2005
PTU • B-TECH • Mechanical Engineering • 1st-2nd • Dec-2005
basic electrical and electronics engineering previous year question papers on BRpaper are organized for students of Punjab Technical University’s Bachelor of Technology program, 1st-2nd semester. This section makes it easier to browse subject-wise old question papers for basic electrical and electronics engineering, so students can review how questions are typically framed in past exams and get a sense of the exam pattern. Many students search for basic electrical and electronics engineering question bank with answers while preparing for exams, and this page is built to support exactly that kind of subject-wise browsing and revision. BRpaper is not the official website of Punjab Technical University or any institution, and it does not publish official notices or academic updates.
BTEE 101 Basic Electrical and Electronics Engineering
Part A (Electrical Engineering)
1. Direct Current (DC) Circuits: Circuit elements and connected terminology, Kirchoff‟s Laws- Statement and Illustrations, Method of solving circuits by Kirchoff‟s law, Star-Delta Conversion, Computation of resistance at constant temperature, resistance at different temperatures, Ohm‟s Law- Statement, Illustration and Limitation, Units- Work, Power and Energy (Electrical, Thermal and Mechanical). DC Transients for RL and RC series circuits (7)
2. Alternating Current (AC) Fundamentals: Generation of alternating electro-motive force EMF, Concept of 3-phase EMF Generation, Peak, Root Mean Square and Average value of alternating current, Phasor representation of alternating quantities, Analysis of AC Circuit Representation of Alternating Quantities in Rectangular and polar forms. Introduction of Resistive, Inductive & Capacitive circuits and their series and parallel combinations. Concept of resonance in series and parallel circuits, Analysis of balanced 03 phase system with star-delta connections. (7)
3. Magnetic Circuits and Transformer: Comparison between magnetic and electric circuits, Magnetic effects of electric current, Current carrying conductor in magnetic field, Law of Electromagnetic Induction and its law, Self Inductance, Mutual Inductance, Coupling Coefficient between two magnetically coupled circuits. Single Phase Transformer: Construction, Working principle, Efficiency, Voltage regulation and applications.(7)
4. Rotating Electrical Machines: D.C. machines (motors and generators), Three phase Induction motor, Synchronous machines (motors and generators): construction, working principle, classification and applications. (7)
Part B (Electronics Engineering)
5. Transducers: Introduction, working and application of LVDT, Strain Gauge and Thermistor. Introduction and application of Digital Multimeter. (7)
6. Semiconductor Devices: Principle of operation characteristic and application of PN Junction Diode, Rectifiers, Zener Diode, Principle of operation characteristic and application of Bipolar Junction Transistor, Principle of operation and characteristic Field Effect Transistor, Regulated Power Supply. (7)
7. Digital Electronics: Binary, Octal and Hexadecimal number System & its arithmetic operations, Logic gates, Introduction of R-S, J-K, D and T Flip Flops & its truth tables. (6)
Solved Questions
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Write the mathematical expression for a 50 Hz sinusoidal voltage supplied for domestic purposes at 230 V.Short Answer Dec-2005 • PTU B-TECH
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A wire carries both ac and dc current with max. value of ac 20A and 5A of ac. The frequency of resultant current is 25 Hz. Write mathematical expression for the wire current as a function of time and draw the wave shape.Long Answer Dec-2005 • PTU B-TECH
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Three 100Ω resistors are connected in star across a 440V, 50Hz, 3-phase supply. One of the phases is disconnected. What will be the line current and total absorbed power?Short Answer Dec-2005 • PTU B-TECH
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Why is an iron-silicon alloy used in a transformer?Very Short Answer Dec-2005 • PTU B-TECH
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Why cannot a 3-phase induction motor run at synchronous speed?Very Short Answer Dec-2005 • PTU B-TECH
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Dec 2012 Why cannot a 3-phase induction motor run at synchronous speed?
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May 2010 Why cannot a 3-phase induction motor run at synchronous speed?
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Which losses occur in a dc machine?Very Short Answer Dec-2005 • PTU B-TECH
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Dec 2023 What are Constant Losses in a DC Machine?
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When a resistor is placed across 230V supply (dc) the current is 12A. What is the value of resistor that must be connected in parallel to increase the load current to 16A?Short Answer Dec-2005 • PTU B-TECH
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What are uses of LVDT for measurements?Very Short Answer Dec-2005 • PTU B-TECH
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May 2023 b) What is LVDT? Give its principle of working, applications, advantages and disadvantages.
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Dec 2023 What do you understand by LVDT? Explain the working of LVDT with the suitable neat sketch.
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Dec 2020 Explain construction & working of LVDT in detail.
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May 2019 What is LVDT? Explain its use for the measurement of displacement.
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Dec 2019 Explain the principle of operation, construction and applications of LVDT.
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May 2017 Explain construction and working of LVDT in detail.
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May 2016 What is LVDT? Give its principle of working, applications, advantages and disadvantages.
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May 2014 What is full form of LVDT? Give its two applications.
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Dec 2014 Discuss working of LVDT and explain it with any one application of LVDT.
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May 2012 Explain in detail operation of LVDT and list its field of application.
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Dec 2012 What is LVDT? Discuss its principle and applications with neat diagram.
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Dec 2012 Explain the working principle of LVDT.
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Dec 2009 What is LVDT? Explain its use for the measurement of displacement.
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Dec 2008 Discuss construction, working principle, merits and demerits of LVDT.
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May 2007 What is LVDT? Explain its use for the measurement of displacement.
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Dec 2007 Explain the principle and working of LVDT.
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Convert the fractional decimal number (0.625)10 into a binary number.Very Short Answer Dec-2005 • PTU B-TECH
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May 2010 Convert the fractional decimal number (0.625)10 into binary number.
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What is field effect transistor? List its applications.Short Answer Dec-2005 • PTU B-TECH
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Give working principle of induction type energy meter.Short Answer Dec-2005 • PTU B-TECH
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May 2019 Explain the construction & working of induction type energy meter.
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May 2017 Explain working of Induction type Energy meters.
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May 2016 Explain induction type energy meter in detail.
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Dec 2012 Discuss in detail the operation of an induction type energy meter.
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Dec 2009 Explain the construction and working of induction type energy meter.
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May 2007 Explain the construction and working of induction type energy meter.
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Define mutual inductance (M) and show that K = M / sqrt(L1L2) ≤ 1, where L1 and L2 are inductance of coil 1 and coil 2 respectively and K is coupling coefficient.Long Answer Dec-2005 • PTU B-TECH
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Discuss principle of operation of a 3-phase induction motor. What is frequency of rotor current? Discuss.Long Answer Dec-2005 • PTU B-TECH
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May 2019 Explain the working principle & construction of three phase induction motor.
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May 2018 Discuss principle of operation of a 3-phase induction motor. What is frequency of rotor currents? Discuss.
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May 2015 Explain principle, construction and working of 3 phase induction motor with suitable sketches.
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May 2014 Explain the principle of working of three-phase induction motor.
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May 2011 Describe the principle, construction and working of 3-phase induction motor with neat diagrams.
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May 2010 Give a clear explanation of the production of torque in 3-phase induction motor.
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Dec 2009 Explain the working principle and construction of three phase induction motor.
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May 2007 Explain the working principle and construction of three phase induction motor.
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A 3 phase induction motor is wound for 4 poles and is supplied from 3 phase, 50 Hz system. Calculate (i) the synchronous speed (ii) speed of the motor when slip is 0.04 and (iii) the rotor when the motor runs at 60 rpm.Short Answer Dec-2005 • PTU B-TECH
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May 2016 A 3-φ induction motor is wound for 4 poles and is supplied from 50 Hz system. Calculate the synchronous speed.
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May 2016 A 3-φ induction motor is wound for 4 poles and is supplied from 50 Hz system. Calculate the rotor speed when slip is 4%.
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May 2016 A 3-φ induction motor is wound for 4 poles and is supplied from 50 Hz system. Calculate the rotor frequency when rotor runs at 600 rpm.
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Dec 2012 A 3 phase induction motor is wound for 4 poles and is supplied from 3 phase, 50 Hz system. Calculate the synchronous speed.
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Dec 2012 A 3 phase induction motor is wound for 4 poles and is supplied from 3 phase, 50 Hz system. Calculate the speed of the motor when slip is 0.04.
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Dec 2012 A 3 phase induction motor is wound for 4 poles and is supplied from 3 phase, 50 Hz system. Calculate the rotor when motor runs at 60 rpm.
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Discuss how you analyze series R-C circuit. Draw its phasor diagram.Long Answer Dec-2005 • PTU B-TECH
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May 2019 Draw & explain the phasor diagram of RLC series circuits and give the condition for resonance in this circuit.
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May 2012 Draw phasor diagram of a series R-L-C A.C. circuit.
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Dec 2009 Draw and explain the phasor diagram of RLC series circuit and give the condition for resonance in this circuit.
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May 2007 Draw and explain the phasor diagram of RLC series circuit and give the condition for resonance in this circuit.
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A series circuit consumes 7000 W when connected to 200V, 50Hz supply. The voltage across the resistor is 130V. Calculate (i) the resistance, current, power factor, capacitance and impedance and (ii) also write equation for v(t) and i(t).Long Answer Dec-2005 • PTU B-TECH
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Discuss the temperature dependence of resistance.Short Answer Dec-2005 • PTU B-TECH
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May 2018 Derive an expression for resistivity of a conductor material and explain the effect of temperature on it.
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Dec 2016 On what factors does the resistance of a conductor depend?
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Dec 2012 Derive the relation for effect of temperature on the resistance of a conductor.
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Dec 2010 Define temperature coefficient of resistance. Why is its knowledge important?
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May 2009 How does the resistance of metals and semiconductors vary with temperature? What is the significance of a negative temperature coefficient?
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May 2008 Derive an expression for resistivity of a conductor material and explain the effect of temperature on it.
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Dec 2007 What is the effect of temperature on the resistance of the conductor?
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May 2006 What is the effect of temperature on resistivity?
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The filament of 60W, 230V lamp has a working temperature of 2000°C. Take the temperature coefficient of the material to be 0.005. Find the approximate current which flows at instant of switching on the supply to the cold lamp.Short Answer Dec-2005 • PTU B-TECH
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Define transducer. State its classifications with 4 examples of passive type transduction.Short Answer Dec-2005 • PTU B-TECH
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May 2018 Define transducer. State its classifications with 4 examples of passive type transduction.
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May 2010 Define transducers. How are these classified? Give four examples of active transducers.
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What is piezoelectric transducer? Give its advantages and disadvantages.Short Answer Dec-2005 • PTU B-TECH
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May 2016 Explain in brief Piezoelectric transducer.
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Dec 2012 Explain the working principle of a piezoelectric transducer.
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Dec 2010 What is a piezoelectric transducer?
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May 2009 Discuss the working principle, frequency response and applications of piezoelectric transducers.
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Discuss working principle of a P-N junction diode. Also show its characteristics and mention some of its applications.Long Answer Dec-2005 • PTU B-TECH
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Dec 2017 Explain the operation of p-n junction diode in the forward and reverse biased conditions. Explain characteristics of p-n junction diode in forward and reverse region.
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May 2015 Explain principle of operation & characteristics of a PN junction diode.
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Dec 2012 Discuss working principle of a P-N junction diode. Also show its characteristics and mention its important applications.
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May 2010 What is a P-N junction and how is it formed? Explain V-I characteristics of a P-N junction diode.
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A germanium diode has a saturation current of 10^-8 A. Calculate for the junction current for a forward bias of 0.4 V and 300°K.Short Answer Dec-2005 • PTU B-TECH
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Dec 2012 A germanium diode has a saturation current of 10–8 A. Calculate the junction current for a forward bias of 0.4 volts and 300°K.
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What is an integrated circuit? Why is it so commonly used? Discuss.Short Answer Dec-2005 • PTU B-TECH
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Explain the terms: CMMR and output offset voltage.Short Answer Dec-2005 • PTU B-TECH
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What is T-flip flop? Give its symbol and draw wave from the flip flop.Short Answer Dec-2005 • PTU B-TECH
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May 2010 What is T Flip flop? Give its symbol and draw wave form of T flip-flop.
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What is meant by IC-Timer? How is IC-555 used to generate square wave form? Explain.Short Answer Dec-2005 • PTU B-TECH
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Answers about this subject, solved papers, and preparation.
01 Where can I find basic electrical and electronics engineering previous year question papers for Bachelor of Technology, 1st-2nd semester?
This page lists basic electrical and electronics engineering question papers uploaded for Punjab Technical University Bachelor of Technology, 1st-2nd semester, organized for subject-wise browsing where available.
02 Are these official Punjab Technical University question papers?
BRpaper is not the official website of Punjab Technical University. These papers are shared for reference and revision purposes only and are not official university material.
03 How can previous year basic electrical and electronics engineering papers help in exam preparation?
Reviewing past papers can help you understand how questions are typically framed, notice commonly repeated topics, and get a sense of the exam pattern before your own exam.
04 What kind of topics does basic electrical and electronics engineering usually cover?
The question papers here relate to the official basic electrical and electronics engineering syllabus set by the university for this course and semester.
05 Does this page include a basic electrical and electronics engineering question bank with answers or solved answers?
This page focuses on providing access to the previous year question papers themselves. A separate question bank or solved answers may not be available for every paper.
06 Can I find papers for other subjects in the same Bachelor of Technology?
Yes, BRpaper organizes papers by university, course, stream, and semester, so you can browse other subjects within the same Punjab Technical University Bachelor of Technology.