Name of the College : Kings College of Engineering
University : Anna University Chennai
Department : Mechanical Engineering
Subject Code/Name : EE 1153 – Basic Electrical & Electronics Engineering
Year : I
Semester : II
Degree : B.E
Website : kings.ac.in
Document Type : Question Bank
Download :https://www.pdfquestion.in/uploads/ki…560-EE1153.pdf
Kings Basic Electrical & Electronics Engineering Question Paper
Unit – I
Electrical Circuits and Measurements :
Part – A (2 Marks) :
1. State Ohm’s law.
2. Mention the limitations of Ohm’s Law.
3. State Kirchhoff’s voltage law.
Related : Kings College of Engineering GE1151 Basic Civil & Mechanical Engineering B.E Question Bank : www.pdfquestion.in/1564.html
4. State Kirchhoff’s Current law.
5. State two salient points of a series combination of resistance.
6. State two salient points of a parallel combination of resistance.
7. Give two applications of both series and parallel combination.
8. Define an ideal voltage source.
9. Define an ideal current source.
10. Explain how voltage source with a source resistance can be converted into an equivalent current source.
11. Define R.M.S value.
12. State the advantages of sinusoidal alternating quantity.
13. What is a phasor?
14. What is balanced voltage?
15. What are balanced impedance?
16. What is phase sequence?
17. Write the relation between the line and phase value of voltage and current in a balanced star connected load?
18. Write the relation between the line and phase voltage of voltage current in a balanced delta connected load.
19. Write the relation between the power factor and wattmeter readings in two-wattmeter method of power measurement.
20. In three phase circuit, what do you mean by balanced load?
21. When is a three phase supply system called balanced supply system?
22. List any two advantages of 3-phase system over 1-phase system.
23. Mention the two types of MI instruments.
24. How can ammeter and voltmeter are connected in a circuit? Why?
25. Mention any two types of Wattmeters.
26. List the major components of a single phase induction type energy meter?
27. List the measuring instruments you known.
28. Compare moving coil and moving iron instruments based on any two salient features.
29. Mention any two importance of MC and MI instruments.
30. What are the advantages of Induction type energy meter?
Part – B :
1. (a) State and explain Kirchoff’s law. (8)
(b) Explain the working of a Dynamometer wattmeter with a neat sketch. (8)
2. (a) Explain any one type of MI instruments. (8)
(b) Explain the working principle of PMMC instruments. (8)
3. Explain the construction and principle of operation of single phase energy meter. (16)
4. (a) A series circuit has R=10, L=50mH, and C=100µF and is supplied with 200V,50Hz.
Find (i) Impedance (ii) current (iii) power (iv) power factor (v) voltage drop across the each element. (8)
(b) Derive the equation for equivalent resistance of number of resistors connected in parallel. (8)
5. A 400V is applied to three star connected identical impedances each consisting of a 40 resistance in series with 3 inductance reactance. Find (i) line current (ii) Total power supplied. (16)
6. Find the current through each branch by network reduction technique. (16)
7. Calculate a) the equivalent resistances across the terminals of the supply, b) total current supplied by the source and c) power delivered to 16 ohm resistor in the circuit shown in figure. (16)
8. In the circuit shown, determine the current through the 2 ohm resistor and the total current delivered by the battery. Use Kirchhoff’s laws. (16)
9. (a) In the network shown below, find the current delivered by the battery. (10)
(b) Discuss about voltage and current division principles. (6)
10. Using the node voltage analysis, find all the node voltages and currents in 1/3 ohm and 1/5 ohm
resistances of figure. (16)
Unit – II
Electrical Machines :
Part – A (2 Marks)
1. State the three basic types of rotating electrical machines.
2. State two types of induction motors.
3. Mention the difference between core and shell type transformers.
4. What is the purpose of laminating the core in a transformer?
5. Give the emf equation of a transformer and define each term.
6. Does transformer draw any current when secondary is open? Why?
7. Define voltage regulation of a transformer.
8. What are the applications of step-up & step-down transformer?
9. How transformers are classified according to their construction?
10. Write down the emf equation for d.c.generator.
11. Why the armature core in d.c machines is constructed with laminated steel sheets instead of solid steel sheets?
12. Why commutator is employed in d.c.machines?
13. Distinguish between shunt and series field coil construction.
14. How does d.c. motor differ from d.c. generator in construction?
15. How will you change the direction of rotation of d.c.motor?
16. What is back emf in d.c. motor?
17.Why starter is necessary for a dc motor?
18. What are the conditions to be fulfilled by for a dc shunt generator to build back emf?
19. What are the losses occurring in a dc machine?
20. What is the function of capacitor in a single phase induction motor?
21. What kind of motor is used in a mixie?
22. In which direction does a shaded pole induction motor run?
23. Why singe phase induction motor has low power factor?
24. What happens when the centrifugal switch fails to close?
25. What are the classifications of single phase induction motor based on the method of starting?
Part – B :
1. Explain the construction and principle of operation of a DC generator with neat sketch. (16)
2. (a) Derive the equation for induced EMF of a DC machine. (8)
(b) Derive the torque equation of DC motor. (8)
3. Describe the construction details of transformer and also explain the principle of operation. (16)
4. (a) Derive the EMF equation of a transformer. (8)
(b) Explain the principle of operation of DC Motor. (8)
5. Explain the construction and principle of operation of single phase induction motor. (16)
6. A transformer with 40 turns on the high voltage winding is used to step down the voltage from 240V to 120V. Find the number of turns in the low voltage winding. (16)
7. A 4 pole, wave wound generator having 40 slots and 10 conductors placed per slot. The flux per pole is 0.02 wb. Calculate the generated emf when the generator is drive at 1200 rpm. (16)
8. A 25kw, 250V, dc shunt generator has armature and field resistances of 0.06ohm and 100ohm respectively. Determine the total armature power developed when working (1) as a generator delivering 25 kw output and (2) as a motor taking 25kw. (16)
Unit – III
Semiconductor Devices And Applications :
Part – A (2 Marks) :
1. Give the value of Charge, Mass of an electron.
2. Define Electron volts.
3. What are conductors? Give examples?
4. What are insulators? Give examples?
5. What are Semiconductors? Give examples?
6. What are the types of Semiconductor?
7. What is Intrinsic Semiconductor?
8. What is Extrinsic Semiconductor?
9. What are the types of Extrinsic Semiconductor?
10. What is P-type Semiconductor?
11. What is N-type Semiconductor?
12. What is doping?
13. Which charge carriers is majority and minority carrier in N-type Semiconductor?
14. Which charge carriers is majority and minority carrier in P-type Semiconductor?
15. What is depletion region in PN junction?
16. Give the other names of depletion region?
17. What is barrier potential?
18. What is meant by biasing a PN junction?
19. What are the types of biasing a PN junction?
20. What is forward bias and reverse bias in a PN junction?
21. What is meant by reverse recovery time?
22. What is break down? What are its types?
23. What is Zener breakdown?
24. What is avalanche break down?
25. Why transistor called a current controlled device?
26. When does a transistor act as a switch?
27. What is biasing?
28. What is operating point?
29. What is stability factor?
30. What is d.c load line?
31.What is a.c load line?
32. What is an amplifier?
33. How are amplifiers classified according to the input?
34. How are amplifiers classified according to the transistor configuration?
35. What is the different analysis available to analyze a transistor?