Code No.OR-411151 IV B.Tech I Semester (Supplementary) Examinations, May 2003
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POWER AND INDUSTRIAL ELECTRONICS (Bio-Medical Engineering) Time: 3 hours Max. Marks:70 Answer any FIVE questions All questions carry equal marks --1.a) Compare class A, Class B and Class C power amplifiers. b) Draw the circuit diagram of push-pull power amplifier and explain its working with wave forms. Classify small signal tuned amplifiers and mention their applications. Explain the principle of single tuned capacitance coupled amplifiers.
3.a)
Classify various commutation techniques. Also explain class A commutation circuit using capacitor. Explain various ways of triggering of SCR.
b) 4.a) b)
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2.a) b)
Explain the operation of basic chopper circuit with voltage and current waveforms. What are the applications of inverters in industry. Explain the basic principle of single-phase voltage source inverter circuit. Explain the operation of bimetal strip tuner circuit. Explain the basic resistance welding process.
6.a) b)
Explain the basic principle of DC motor control using SCR. Explain the working of automatic overhead protection circuit of DC motor using thyristor.
7.a) b)
Explain the basic principle of induction heating. What are the applications of dielectric heating.
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5.a) b)
Explain the principle of piezoelectric ultrasonic generator. Discuss the applications of ultrasonic waves.
(Supplementary) Examinations, May 2003 POWER AND INDUSTRIAL ...
b) Explain the principle of single tuned capacitance coupled amplifiers. 3.a) Classify various commutation techniques. Also explain class A commutation.
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Present a program schema for a FIFO branch and bound search for a Least â Cost · answer node. 8. Explain in detail how the technique of backtracking can be ...
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b) Prove the independent laws for the elements of a lattive. 4. Using Warshall's algorithm, compute the adjacency matrix of the transitive · closure of the digraph.
Functions with half wave symmetry have only odd harmonics. 3. (a) Determine ... (a) State and prove the convolution and scale change properties in z transform.
