Annamalai University 2008-3rd Sem B.E Computer Science and Engineering , (/information techology) (ester) coec-303/itec-302 basics of electrical and electronics engineering - Question Pape
ELECTRONICS ENGINEERING
TOTAL NO OF PAGES:4
TOTAL NO OF UNITS:5
TOTAL MAXIMUM MARKS :60
HAVE TO ATTEND full 1 ques. FROM every UNIT.
every SINGLE ques. IS DIVIDED INTO SUB PART 'a' AND 'b'.
Register Number:
6 0 6 4
Name of the Candidate :
B.E. DEGREE EXAMINATION, 2008
(COMPUTER SCIENCE AND ENGINEERING/ INFORMATION TECHNOLOGY)
(THIRD SEMESTER)
COEC - 303 / ITEC - 302.
BASICS OF ELECTRICAL AND ELECTRONICS ENGINEERING
May ] [ Time : 3 Hours
Maximum : 60 Marks
UNIT - I
1. (a) State Kirchoffs second law. (4)
(b) For the circuit given in Fig. * 1 (b), find out the current flowing thro 5 Q resistance and power delivered by the source.
2 Q
-'VVN.
2 0 IlOO
+
20 V
60
-MA.
-AAA-
4 0 50
Fig. - 1 (b).
2. (a) What is meant by Power Factor* in an ac circuit ? What is its importance ?
(4)
(b) A series RC circuit connected across an ac supply y = 141*4 sin wt dissipates 700 watts of power at 0-707 leading power factor. Find out the values of R* and C\ (8)
3. (a) Starting from basics, derive an expression
for EMF equation of a DC generator ?
(b) State the applications of DC series and shunt motors. (3)
4. (a) Why the rating of transformers is given
in KVA ? (3)
(b) Draw the equivalent circuit of a single phase transformers and explain the various terms. (9)
UNIT-III
5. (a) An induction motor having 8 poles
runs on 50 Hz supply. If it operates at full - load at 720 rpm, calculate the slip.
(4)
(b) Draw and explain the Torque - slip characteristics of a three phase squirrel cage induction motor. (8)
6. (a) State the different methods of starting of
single phase induction motor. (3)
(b) With suitable diagrams, explain the operation of DC servo motor. (9)
UNIT - IV
7. (a) What is meant by capacity of a cell? In
what units is it expressed ? (3)
(b) Explain the construction and characteristics of a nickel - cadmium ore. (9)
8. (a) State and explain the laws of illumination.
(9)
(b) What is a voltage regulator? (8)
UNIT-V
9. (a) What is meant by zener break down ?
(3)
(b) Explain the input and output characteristics of a BJI in CE configuration. (9)
10. (a) With suitable diagrams, explain the
construction and operation of JFET. (9)
(b) What is a photo diode ? (3)
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Attachment: |
| Earning: Approval pending. |
