Reg. No.
9 5 1 7
Question Paper Code : 21173
B.E. / B.TECH. DEGREE EXAMINATIONS, MAY / JUNE 2024
Second Semester
Civil Engineering
23GE203 – BASIC ELECTRICAL AND ELECTRONICS ENGINEERING
(Regulations: Mepco – R2023)
Duration: 3 Hours Max. : 100 Marks
Answer ALL Questions
BTL, CO
PART A – (10 2 = 20 Marks)
R, CO1 1. An electric iron is rated 1000 W, 240 V. Find the current drawn and resistance of the
heating element.
R, CO2 2. List out the types of induction motor.
U, CO3 3. Draw the V-I characteristics of an ideal diode.
R, CO4 4. What are the materials used for electrical wiring?
U, CO5 5. What role does a sensor play in MEP engineering?
A, CO1 6. Which of the following according to fundaments of electrical energy is correct about
alternating current? Justify your answer.
A) Frequency is zero B) Magnitude changes with time
C) Can be transported to larger distances with less loss in power
D) Flows in both directions
A, CO2 7. In a DC machine, the commutator provides ___________. Justify your answer.
A) Half wave rectification B) Full wave rectification
C) Semi controlled rectification D) Uncontrolled rectification
A, CO3 8. Which of the following device has characteristics very close to the ideal voltage source?
Justify your answer.
A) MOSFET B) PN Junction Diode C) BJT D) Zener diode
A, CO4 9. Insulating materials have the function of ___________. Justify your answer.
A) Preventing a short circuit between conducting wire
B) Preventing an open circuit between the voltage source and the load
C) Conducting very large currents
D) Storing very high currents
A, CO5 10. Humidity sensor generates output in ________ form. Justify your answer.
A) Digital B) Analog C) Both A and B D) Heat
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PART B – (4 15 = 60 Marks)
U, CO2 11. a) i. Explain the constructional details of D.C machine with neat sketch. (10 Marks)
U, CO2 11. a) ii. Compare core type and shell type transformer. (5 Marks)
OR
U, CO2 11. b) i. Describe the construction of a three phase induction motor with neat
diagrams. (10 Marks)
U, CO2 11. b) ii. Compare the various types of rotors in an alternator. (5 Marks)
U, CO3 12. a) Explain CB configuration of a transistor with the help of input and output
characteristics. (15 Marks)
OR
U, CO2 12. b) Explain the working of a MOSFET and draw its input, output
characteristics. (15 Marks)
U, CO3 13. a) Explain the various methods of electrical wiring system. Also explain
parallel wiring and series wiring. (15 Marks)
OR
U, CO3 13. b) What is the significance of protection in electrical wiring? Show with the
help of labeled diagrams the essential features of (A) pipe and (B) plate
earthing. (15 Marks)
U, CO4 14. a) Discuss about the classification of sensors based on different characteristics. (15 Marks)
OR
U, CO4 14. b) With neat block diagrams, explain the working of smoke and water leakage
detection sensor used in buildings. (15 Marks)
PART C – (1 20 = 20 Marks)
E, CO1 15. a) Determine the current in all the branches and voltage across every resistor
by using KVL. Verify the same using nodal analysis.
(20 Marks)
OR
E, CO1 15. b) Determine the values of mesh currents using mesh analysis method in the
circuit shown below:
(20 Marks)
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