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ENEE 103Bachelor in Civil Engineering · Semester 11 Paper Available

Basic Electrical and Electronics Engineering

Past examination question papers and complete curriculum syllabus for Basic Electrical and Electronics Engineering (ENEE 103), Bachelor in Civil Engineering Semester 1 under Institute of Engineering (IOE), Tribhuvan University.

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1st-sem_Basic Electrical and Electronics Engineering.pdf

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Most Frequently Asked Questions

Top recurring IOE board exam questions for Basic Electrical and Electronics Engineering with verified mark schemes, formula notation, and recurrence frequency.

Showing 30 of 30 top repeated questions

Basic Circuits Concepts

13 Questions
#1Repeated 2 Times[6 Marks]Basic Circuits Concepts
Determine the value of $R$, if the power dissipated in $10\,\Omega$ resistor is 90 W for the circuit shown.
Appeared in:2083 Baishakh2082 Baishakh
#2Repeated 2 Times[8 Marks]Basic Circuits Concepts
Calculate the value of $R_L$ to be connected in the circuit to receive maximum power and determine the maximum power received by it.
Appeared in:2083 Baishakh2082 Baishakh
#3Repeated 2 Times[4 Marks]Basic Circuits Concepts
Differentiate between practical voltage source and practical current source. What are ideal and practical voltage and current sources?
Appeared in:2083 Baishakh2082 Shrawan
#4Repeated 2 Times[4 Marks]Basic Circuits Concepts
State and explain Norton's theorem with a suitable example.
Appeared in:2083 Baishakh2082 Shrawan
#5Repeated 2 Times[6 Marks]Basic Circuits Concepts
State and prove Maximum Power Transfer Theorem for DC circuits. What are its practical limitations in power transmission systems?
Appeared in:2081 Bhadra2082 Baishakh
#6Repeated 2 Times[8 Marks]Basic Circuits Concepts
State Thevenin's theorem and Norton's theorem. Explain the step-by-step procedure to determine Thevenin's equivalent resistance $R_{th}$ when independent and dependent sources are present.
Appeared in:2081 Bhadra2080 Baishakh
#7Repeated 2 Times[6 Marks]Basic Circuits Concepts
Two resistors having temperature coefficients $\alpha_1 = 0.004/\text{}^\circ\text{C}$ and $\alpha_2 = 0.005/\text{}^\circ\text{C}$ are connected in parallel and consume equal power at $15^\circ\text{C}$. What is the ratio of power consumed in $R_1$ to that in $R_2$ at $70^\circ\text{C}$?
Appeared in:2081 Bhadra2078 Bhadra
#8Repeated 1 Times[6 Marks]Basic Circuits Concepts
The resistance of a certain length of wire is $4.60\,\Omega$ at $20^\circ\text{C}$ and $5.68\,\Omega$ at $80^\circ\text{C}$. Determine (i) the temperature coefficient of resistance of the wire at $0^\circ\text{C}$, (ii) the resistance of the wire at $60^\circ\text{C}$.
Appeared in:2083 Baishakh
#9Repeated 1 Times[6 Marks]Basic Circuits Concepts
Two resistors, made of different materials having temperature coefficients of resistance $\alpha_1 = 0.004/^\circ\text{C}$ and $\alpha_2 = 0.005/^\circ\text{C}$, are connected in parallel and consume equal power at $15^\circ\text{C}$. What is the ratio of power consumed in resistance $R_2$ to that in $R_1$ at $70^\circ\text{C}$?
Appeared in:2082 Baishakh
#10Repeated 1 Times[8 Marks]Basic Circuits Concepts
Use nodal analysis method to determine the node voltages $V_a$, $V_b$ and $V_c$ and calculate current through $2\,\Omega$.
Appeared in:2083 Baishakh
#11Repeated 1 Times[8 Marks]Basic Circuits Concepts
State superposition theorem. Use superposition theorem to find the current flowing through the $3\,\Omega$ resistor shown in figure.
Appeared in:2082 Baishakh
#12Repeated 1 Times[4 Marks]Basic Circuits Concepts
Derive the mathematical expression for the energy stored in an electrostatic field of a capacitor: $W = \frac{1}{2} C V^2$.
Appeared in:2082 Baishakh
#13Repeated 1 Times[4 Marks]Basic Circuits Concepts
How does mutual inductance between two coils depend upon the dimensions of the core and coils?
Appeared in:2082 Shrawan

Average and RMS Values

2 Questions
#1Repeated 2 Times[6 Marks]Average and RMS Values
Find the r.m.s. and average value of the given chopped sine wave $v(t) = 10\sin t$ active between $\pi/4$ and $\pi$ in a cycle of period $2\pi$.
Appeared in:2083 Baishakh2082 Baishakh
#2Repeated 2 Times[6 Marks]Average and RMS Values
Define form factor and crest factor. Derive the RMS value, average value, and form factor for a half-wave rectified sinusoidal waveform.
Appeared in:2081 Bhadra2082 Shrawan

AC Circuit Analysis

8 Questions
#1Repeated 2 Times[4 Marks]AC Circuit Analysis
A three phase 230V load has a power factor of 0.7. Two wattmeters are used to measure power that shows the input to be 10 kW. Find the reading of each wattmeter.
Appeared in:2083 Baishakh2082 Baishakh
#2Repeated 2 Times[6 Marks]AC Circuit Analysis
A coil of resistance $12\,\Omega$ and inductance 0.05 H, a non-inductive resistor of $20\,\Omega$ resistance and a loss-free $40\,\mu\text{F}$ capacitor are connected in series across a 240 V, 50 Hz sinusoidal supply. Calculate: (i) The current, (ii) The voltage across the coil and the capacitor, (iii) The power consumed in the circuit.
Appeared in:2083 Baishakh2082 Baishakh
#3Repeated 2 Times[8 Marks]AC Circuit Analysis
Discuss the effect of low power factor. A single phase load of 7 kW operates at a power factor 0.7 lagging. It is proposed to improve the power factor to 0.9 lagging by connecting a capacitor across the load. Calculate the kVAr rating of the capacitor.
Appeared in:2083 Baishakh2082 Shrawan
#4Repeated 2 Times[8 Marks]AC Circuit Analysis
A coil of resistance $12\,\Omega$ and inductance $0.05\text{ H}$ is connected in series with a non-inductive resistor of $20\,\Omega$ and a $100\,\mu\text{F}$ capacitor across a $240\text{ V}, 50\text{ Hz}$ supply. Calculate: (i) circuit impedance, (ii) current, (iii) power factor, and (iv) total power consumed.
Appeared in:2081 Bhadra2082 Baishakh
#5Repeated 2 Times[8 Marks]AC Circuit Analysis
Explain series resonance in an RLC circuit. Derive expressions for resonant frequency $f_0$, quality factor $Q$, and half-power bandwidth.
Appeared in:2082 Shrawan2079 Baishakh
#6Repeated 2 Times[8 Marks]AC Circuit Analysis
Show analytically that two wattmeters are sufficient to measure total 3-phase power in an unbalanced 3-phase, 3-wire star-connected load. Derive the expression for load power factor in terms of wattmeter readings $\tan\phi = \sqrt{3}\frac{W_1 - W_2}{W_1 + W_2}$.
Appeared in:2081 Bhadra2082 Baishakh
#7Repeated 1 Times[8 Marks]AC Circuit Analysis
A parallel circuit consists of two branches, one containing a coil of resistance $5\,\Omega$ and inductance 38.2 mH, the other a non-inductive resistance $16\,\Omega$ in series with a capacitor of $300\,\mu\text{F}$ capacitance. The circuit is connected to a 240 V, 50 Hz supply. Determine (i) the current in each branch, (ii) the total current, (iii) the circuit phase angle, (iv) the circuit impedance, (v) the components of an equivalent circuit consisting of a resistance and reactance.
Appeared in:2083 Baishakh
#8Repeated 1 Times[8 Marks]AC Circuit Analysis
A three phase delta connected system with 400 V line voltage is connected to three unbalanced loads: $(12-j16)\,\Omega$, $(3+j4)\,\Omega$, and $20\,\Omega$, also connected in delta. Find (i) phase currents, (ii) line currents, (iii) total active power consumed.
Appeared in:2082 Shrawan

Diodes

3 Questions
#1Repeated 2 Times[8 Marks]Diodes
Explain the operation of a full-wave bridge rectifier with a neat circuit diagram. Derive expressions for its DC output voltage, ripple factor, and rectification efficiency.
Appeared in:2082 Baishakh2080 Bhadra
#2Repeated 2 Times[8 Marks]Diodes
Explain the working principle of a Zener diode as a shunt voltage regulator. Design a Zener regulator for an output voltage of $6\text{ V}$ with an input varying from $10\text{ V}$ to $16\text{ V}$ and a load current varying from $5\text{ mA}$ to $25\text{ mA}$.
Appeared in:2083 Baishakh2081 Bhadra
#3Repeated 2 Times[6 Marks]Diodes
Explain clipper and clamper circuits with their circuit diagrams and transfer characteristics. Draw the output waveform for a biased positive clipper.
Appeared in:2082 Shrawan2079 Bhadra

Transistor

2 Questions
#1Repeated 2 Times[8 Marks]Transistor
Draw the input and output characteristics of an NPN Bipolar Junction Transistor (BJT) in Common Emitter (CE) configuration. Define active, saturation, and cut-off regions.
Appeared in:2082 Baishakh2081 Bhadra
#2Repeated 2 Times[8 Marks]Transistor
Explain voltage divider biasing (self-bias) of a BJT circuit. Derive the expression for the stability factor $S$ and show why it provides excellent thermal stability against $\beta$ variations.
Appeared in:2082 Shrawan2080 Baishakh

Operational Amplifier and Oscillator

2 Questions
#1Repeated 2 Times[8 Marks]Operational Amplifier and Oscillator
List the ideal characteristics of an Operational Amplifier (Op-Amp). Derive the voltage gain formula for an inverting amplifier and a non-inverting amplifier using the virtual ground concept.
Appeared in:2082 Baishakh2081 Bhadra
#2Repeated 2 Times[8 Marks]Operational Amplifier and Oscillator
State Barkhausen criterion for sustained oscillations. Explain the working principle of an RC Wien Bridge oscillator with a circuit diagram and derive its frequency of oscillation $f = \frac{1}{2\pi RC}$.
Appeared in:2082 Baishakh2078 Bhadra

Curriculum Syllabus & Course Topics

Sourced from TU curriculum portal
Full Syllabus (PDF)
Chapter-wise Units & Micro-Syllabus Topics (4 Units)

  1. 1. Fundamentals of Electrical and Electronics Circuits

    • 1.1Current and potential
    • 1.2Circuit components: Source, conductor, resistor, inductor, capacitor
    • 1.3Ohms law
    • 1.4Series and parallel circuits
    • 1.5Kirchhoff’s law and its application
    • 1.5.1Nodal analysis
    • 1.5.2Mesh analysis
    • 1.6Introduction to AC circuits and parameters
    • 1.6.1Generation of AC voltage
    • 1.6.2Waveforms
    • 1.6.3Average value
    • 1.6.4RMS value
    • 1.7Single phase AC circuit analysis with R, RL, RC and RLC load
    • 1.8Three phase AC circuits
    • 1.8.1Waveform and advantage
    • 1.8.2Line and phase quantities in star and delta connection
    • 1.8.3Voltage and current computation in balance circuits
    • 1.8.4Power measurement in three-phase circuits

  2. 2. Electrical Machines

    • 2.1Faraday’s law of electromagnetic induction
    • 2.2Dynamically and statically induced EMFs
    • 2.3Transformer
    • 2.3.1Introduction of single-phase transformer
    • 2.3.2Working principle of transformer
    • 2.3.3Components of transformer
    • 2.3.4Transformation ratio
    • 2.3.5EMF equation of transformer
    • 2.3.6Types of transformers
    • 2.3.7Load and no-load operation
    • 2.3.8Ideal and practical transformer
    • 2.3.9Losses and efficiency
    • 2.3.10Applications
    • 2.4Three-phase induction motor
    • 2.4.1Construction
    • 2.4.2Rotating magnetic field
    • 2.4.3Working principle
    • 2.4.4Direction of rotor and slip
    • 2.4.5Types of rotors
    • 2.4.6Standstill and running condition
    • 2.4.7Modes of operation
    • 2.4.8Torque equations
    • 2.4.9Torque-slip characteristics
    • 2.4.10Applications
    • 2.5DC motors
    • 2.5.1Construction
    • 2.5.2Working principle
    • 2.5.3Back EMF and its significance
    • 2.5.4Power torque relationships
    • 2.5.5Types of motors
    • 2.5.6Losses and efficiency
    • 2.5.7Applications
    • 2.6Synchronous generator
    • 2.6.1Construction
    • 2.6.2Working principle
    • 2.6.3EMF equation
    • 2.6.4Applications

  3. 3. Introduction to Electronics Engineering

    • 3.1Semiconductor and doping
    • 3.2Introduction to diode
    • 3.3Characteristics of PN junction diode
    • 3.4Half-wave and full-wave rectifiers
    • 3.5Zener effect
    • 3.6Zener diode and its characteristics
    • 3.7Zener diode as a voltage regulator
    • 3.8Bipolar junction transistor
    • 3.8.1Biasing
    • 3.8.2BJT as a switch
    • 3.8.3BJT as an amplifier
    • 3.9Introduction to digital electronics
    • 3.10Logic gates and Boolean algebra

  4. 4. Electrical Installations

    • 4.1Consumer power supply system
    • 4.2Overview of electrical wiring components: Switches, sockets, and distribution boards
    • 4.3Protective devices, their constructions and sizing
    • 4.3.1Fuse
    • 4.3.2MCB
    • 4.3.3MCCB
    • 4.4Wires and power cable
    • 4.5Types of wiring system
    • 4.6Determination of size of conductor
    • 4.7Earthing system and its importance
    • 4.8Electrical safety rules

Examination Scheme & Marks Distribution

Evaluation Structure

  • Final Board Theory Exam: 60 Marks (Pass mark: 24)
  • Internal Assessment: 40 Marks (Pass mark: 16)
  • Practical / Lab Exam: 25 or 50 Marks (Continuous lab evaluation + viva, where applicable)

* This is the general current IOE 60/40 scheme; verify course-specific details in the syllabus above.

Exam Preparation Guidelines

  • Review the available past examination paper to understand question styling, typical derivation topics, and marks allocation.
  • Practice drawing labeled circuit schematics, deriving transfer functions, and showing systematic mathematical steps.
  • Structure answers with labeled diagrams, concise bullet points, and highlight final answers in numerical solutions.

Frequently Asked Questions (Basic Electrical and Electronics Engineering)

Q: How can I download Basic Electrical and Electronics Engineering past question papers?

You can preview or download the Basic Electrical and Electronics Engineering question papers (PDF) directly using the built-in viewer on this page with zero redirects or paywalls.

Q: What is the pass mark for Basic Electrical and Electronics Engineering?

The general current scheme is a 60-mark final theory exam and a 40-mark internal assessment, with pass marks of 24 and 16. Verify the course-specific syllabus above.

Q: Where can I find the complete syllabus for this subject?

The available chapter-wise syllabus and topic breakdown is indexed in the Syllabus section above, with links to the curriculum PDF source.

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