Code: A-26
Time: 3 Hours
Subject: POWER ELECTRONICS
Max. Marks: 100

NOTE: There are 11 Questions in all.

  • Question 1 is compulsory and carries 16 marks. Answer to Q. 1. must be written in the space provided for it in the answer book supplied and nowhere else.
  • Answer any THREE Questions each from Part I and Part II. Each of these questions carries 14 marks.
  • Any required data not explicitly given, may be suitably assumed and stated.
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Q.1       Choose the correct or best alternative in the following: (2x8)

a. Which of the following devices has high input impedance and low conduction losses
 

(A) SCR.
(C) TRIAC.

 (B) IGBT.
(D) ) GTO.
b. A single phase full bridge converter can operate in
 

(A) Single Quadrant.
(C) Two Quadrant.

(B) Three Quadrant.
(D) Four Quadrant.

c.

A single phase full bridge converter can operate in

 

(A)
(C)

(B)
(D)

d. McMurray full bridge inverter uses
 

(A) Auxiliary commutation.
(C) Complementary commutation.

(B) Natural commutation.
(D) Load commutation.
e. In a Pulse Width Modulation (PWM) chopper
 

(A) T is kept constant and TON is varied.
(B) ON is kept constant and T is varied.
(C) Both ON and T are varied.
(D) Both ON and T are kept constant.

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