Principles of Electrical Engineering 2018 Question Paper — Government…
The 2018 Principles of Electrical Engineering previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: Principles of Electrical Engineering
- Course: Fundamentals of Electrical. Engg.
- Branch: COMPUTER/ E&C/ I.T. Engineering
- Year: 2018
- Paper: end-term
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt five questions in all selecting at least two questions from each Section.
- Each question carries 20 marks.
- Use of calculator is allowed.
Questions
Section A:
- QQ1. Q1: (a) Find the branch currents in the circuit of figure by using (I) nodal analysis (ii) mesh analysis using matrix form. (14) (b) Explain the source transformation technique used in the DC circuits? (06) [20 marks]
- QQ2. Q2: (a) Find the equivalent resistance for the following circuit and hence calculate the current supplied by the source? (10) (b) Explain the star-delta conversion. Also derive the formula in case of delta-star transformation and star-delta transformation? (10) [20 marks]
- QQ3. Q3: (a) Use superposition theorem to find current through $6\Omega$ resistor for the circuit of fig? (10) (b) Explain the maximum power transfer theorem. Derive the condition for obtaining maximum power from a source to resistive load? (10) [20 marks]
- QQ4. Q4: (a) Explain the kirchhoff's current law and Kirchhoff's voltage law in detail? (10) (b) Determine the current $I_L$ in the circuit shown in the given figure by mesh analysis using matrix form? (10) [20 marks]
Section B:
- QQ5. Q5: Explain the true power, reactive power and apparent power in detail? Also explain what do you meant by resonance? What is its significance? (20) [20 marks]
- QQ6. Q6: (a) Explain the open circuit and short circuit test performed in transformer? (10) (b) Explain the various types of cables in details? (10) [20 marks]
- QQ7. Q7: (a) Explain the principle operation and construction of auto transformer in detail? (08) (b) In the diagram the voltage drop across $Z_1$ is $(10+j0)$ volts. Find out (i) the current in the circuit (ii) the voltage drops across $Z_2$ and $Z_3$ (iii) the voltage of the generator? Also explain what is power factor and causes of low power factor? (12) [20 marks]
- QQ8. Q8: (a) A 6,600/440 v, single phase 600 KVA transformer has 1200 primary turns. Find (I) transformation ratio (II) secondary turns (III) voltage per turn (IV) secondary current when it supplies a load of 400 KW at 0.8 power factor lagging? (10) (b) Explain the MCB, ELCB and MCCB in detail? (10) [20 marks]