Cochin University of Science and Techology (CUST) 2011-2nd Sem B.Tech Computer Science and Engineering B tech I & ester(combined) 107 Basic Electrical and Electronics Engineering - Question Paper
B tech Degree I & II semester(combined) exam June 2011 107 Basic Electrical and Electronics Engineering
BTS(C) -1 & II - II - 031 -D
B. Tech Degree 1 & II Semester (Combined) Examination
1T/CS/EC/CE/ME/SE/EB/EI/EE/FT 107 BASIC ELECTRICAL ENGINEERING
AND ELECTRONICS (2006 Scheme)
BTS(C) -1 & II - II - 031 -D
B. Tech Degree 1 & II Semester (Combined) Examination
Time: 3 Hours Maximum Maries: 100
(A) ELECTRICAL ENGINEERING
PART A (Answer ALL questions)
BTS(C) -1 & II - II - 031 -D
B. Tech Degree 1 & II Semester (Combined) Examination
(5x4 =20)
I. (a) Why domestic appliances are connected in parallel? Give comparison with scries circuit.
(b) State and explain Conlombs law on electrostatics.
(c) Define magnetic flux density and field strength in magnetic circuits.
(d) Explain the generation of alternating voltages and currents.
(e) Distinguish between star and delta connection in three phase circuits.
part b
BTS(C) -1 & II - II - 031 -D
B. Tech Degree 1 & II Semester (Combined) Examination
(2x15 = 30)
II. (a) Stale Thevenin's theorem in electric circuits. (5) (b) Use Thevenins theorem to find the current through 70 in the following circuit. 0)
OR
III. (a) Explain what is meant by the terms electric Held intensity and flux density. What relation (5)
exists between these two?
(b) Two parallel metal plates of large area are spaced at a distance of 10mm from each other (10) in air. A sheet of glass 5mm thick with a relative permitivity of 6 is introduced between the plates. A potential difference of5000V is applied between the plates. Determine the electric field intensities in air and in the glass sheet
IV. (a) Distinguish between statically induced emf and dynamically induced emf. (5)
BTS(C) -1 & II - II - 031 -D
B. Tech Degree 1 & II Semester (Combined) Examination
(b) A mild steel ring of 30cm mean circumference has a cross sectional area of 6 cm2 and has (10)
a winding of 500 turns on it. The ring is cut through at a point so as to provide an air gap of I mm in the magnetic circuit. It is found that a current of 4A in the winding produces a flux density of IT in the air gap. Find
(i) relative permeability of the mild steel
(ii) inductance of the winding.
OR
V. (a) Derive the expression for r.m.s value of a sine wave. (5)
BTS(C) -1 & II - II - 031 -D
B. Tech Degree 1 & II Semester (Combined) Examination
(b) Determine; (10)
(i) the total impedance
(ii) the total current
(iii) overall power factor
(iv) active power; for the following circuit.
2
(B) ELECTRONICS
PART A (Answer AU. questions)
(5 x 4 - 20)
VI. (i) Distinguish between intrinsic and extrinsic semi conductors.
(b) Sketch the V. I characteristics of zener diode. What is the application of a zener diode?
(c) Briefly explain the working of any one transducer.
(d) llow amplitude and frequency of a waveform can be measured in a CRO?
(e) What is modulation? What are the needs of modulation?
PART B
(2x15-30)
VII What are the different configurations of transistors? Compare the performance of each. (15)
OR
Vm. Write brief notes on: (IS)
(i) FET
(ii) SCR
(iii) LED
IX. With the help of a neat block diagram explain the working oft CRO. What are the (15) applications of CRO?
OR
X. (a) Distinguish between AM & FM. (5) (b) Draw the block diagram of a general communication system. Explain the various blocks. (10)
|
Attachment: |
| Earning: Approval pending. |
