www.sahrdaya.ac.in Model Question Paper Sahrdaya College of Engineering And Technology : Basic Electrical and Electronics

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Name of the organisation : Sahrdaya College of Engineering And Technology (sahrdaya.ac.in)
Description : Model Question Paper

Model Question List : http://www.sahrdaya.ac.in/modelexam.php
Model Question Paper : http://www.sahrdaya.ac.in/photouploa...elexam/107.doc

FIRST AND SECOND SEMESTER B.TECH DEGREE EXAMINATION
EC 09 107 –Basic Electrical and Electronics
(2009 admissions)
Time: 3 Hours Maximum: 70 Marks

Part A
(Answer all questions)
1 (a) Define back emf?
(b) What is meant by coefficient of coupling?
(c) Define power factor?
(d) State the logic families? Which logic family is having maximum speed?
(e) State the basic RADAR equation? (5 *2 = 10 marks)

Part B
(Answer any four questions)
II (a)State and explain kirchoff’s law?
(b) Calculate the active and reactive component of current in each phase of a star connected 10,000V, 3O generator supplying 5000kW at power factor of 0.8?
(c) Derive emf equation of a transformer?
(d) Using a block diagram, explain the working of a successive approximation ADC?
(e) What are navigational aids? Why are they used?
(f) Explain the term frequency reuse and the parameters associated with it? (4 *5 = 20 marks)

Part C
III (a) Two coils, A and B are coupled together. Coil A have 100 turns and coil B have 600 turns. When 5A flows in coil A, flux of 5mWb links with coil B. Calculate self inductance and mutual inductance between the coils? Also, compare electric and magnetic circuits?
(Or)
(b). Explain the following terms:
1. Active power
2. Reactive power
3. Power Triangle
A resistance of 10E is connected in series with an inductance of 0.05H and capacitance of 300uF to a 100V supply. Calculate the phase angle of current when frequency is 50Hz?

IV (a) Explain constructional details of induction motor? What are the applications of a DC motor?
(Or)
(b)Explain the construction of a synchronous generator? Explain the basic structure of a power system?

V (a) State the differences between TTL and CMOS logic? With neat diagrams, explain TTL and CMOS inverters?
(Or)
(b) With a neat diagram, explain the construction of a CRO and its’ associated parts?

VI (a) Explain AM and FM with mathematical derivations?
(Or)
(b). Explain in detail about the GSM architecture? State the terms:
1. Concept of cells
2. Handoff
3. How a call is established within the same network?
4. How a call is established between different networks? (4 * 10 = 40 marks)