Download GTU BE/B.Tech 2018 Winter 3rd Sem New 2132404 Principles Of Power Electronics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 3rd Sem New 2132404 Principles Of Power Electronics Previous Question Paper

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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER?III (New) EXAMINATION ? WINTER 2018
Subject Code: 2132404 Date: 14/12/2018

Subject Name: Principles of Power Electronics

Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.



MARKS

Q.1 (a) List out various applications of Power Electronics. 03
(b) Explain Interdisciplinary Nature of Power Electronics. 04
(c) Draw block diagram of ?Power Electronics system? and explain each block in detail. 07

Q.2 (a) Write short notes on Zener Diode. 03
(b) Explain construction and characteristics of Tunnel Diode. 04
(c) Give the comparison of ideal and practical switch with necessary waveform. 07
OR
(c) Explain the concept of Safe Operating Area. 07
Q.3 (a) Explain about the Fast Recovery Diode. 03
(b) Explain the structure of Power Diode. 04
(c) Draw and explain input and output characteristics of NPN transistor in CE
configurations.
07
OR
Q.3 (a) Differentiate between signal and power BJT. 03
(b) Explain DC and AC load line concept for BJT. 04
(c) Explain static V-I characteristics of SCR. 07
Q.4 (a) Explain various Turn-on methods of SCR. 03
(b) Explain construction, characteristics and applications of DIAC. 04
(c) Explain class-A commutation of Thyristor. 07
OR
Q.4 (a) Explain only concept of LASCR. 03
(b) Write short note on TRIAC. 04
(c) Explain class-B commutation of Thyristor. 07
Q.5 (a) List out various applications of MOSFET. 03
(b) Explain the two-transistor analogy of SCR 04
(c) Explain construction and working principle of Power MOSFET. 07
OR

Q.5 (a) Give the comparison between BJT and MOSFET. 03
(b) Explain the GTO in detail. 04
(c) Explain the concept of Soft and Hard Switching of Power Electronics switch. 07


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