### ELECTRICAL ENGINEERING DIPLOMA EXAM QUESTION PAPERS

• KARNATAKA STATE OPEN UNIVERSITY - ELECTRICAL ENGINEERING DIPLOMA EXAM QUESTION PAPERS
• III Semester Diploma in Electrical Engineering Examination, August 2011
• CIRCUIT THEORY
• Time : 3 Hours Max. Marks : 75
• Instructions: All the questions are compulsory. Clearly mark Question Number, Part A and Part B in the Answer Sheet while attempting the questions.
• PART – A (1×15=15)
• 1. Draw the circuit diagram of series connection of resistors.
• 2. Define the term voltage source.
• 3. Draw the circuit for resistors connected in parallel.
• 4. Define the term of current source.
• 5. Define potential difference.
• 6. State Ohm’s laws.
• 7. What is Kirchhof’s laws ?
• 8. State super position theorem.
• 9. What do you mean by star delta transformation ?
• 10. Draw the circuit diagram of series R-L-C circuit.
• 11. What is impedance ?
• 12. Draw series R-L circuit.
• 13. Write the formula of impedance for series R-C circuit.
• 14. State Norton’s theorem.
• 15. Write the unit of electrical power.
• PART – B (5×12=60)
• 16. Derive the expression of current for series R-L-C circuit.
• OR
• Derive the expression of total capacitance of the capacitors when they are
• connected in series and parallel.
• 17. If the three resistors of 40 ohm, 50 ohm and 30 ohm are connected in series with
• 12 v D.C supply, find the current and branch voltages.
• OR
• If the three resistors of 40 ohm, 50 ohm and 30 ohm are connected in parallel
• with 12 v D.C supply, find the main current and branch currents.
• 18. If the resistance, inductance and capacitance of 200 ohm, 5 H and 40 micro farad
• respectively are connected in series, find current and impedance.
• OR
• State and prove super position theorem.
• 19. State and explain Thevinin’s theorem.
• OR
• Distinguish between R-L and R-C parallel circuits.
• 20. Describe the suitable examples of star-delta conversion.
• OR
• State and prove maximum power transfer theorem.

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