1
GATE EE 2024
MCQ (Single Correct Answer)
+1
-0.33

If the following switching devices have similar power ratings, which one of them is the fastest?

A

SCR

B

GTO

C

IGBT

D

Power MOSFET

2
GATE EE 2024
MCQ (Single Correct Answer)
+1
-0.33

A single-phase triac based AC voltage controller feeds a series RL load. The input AC supply is 230 V, 50 Hz. The values of R and L are 10 Ω and 18.37 mH, respectively. The minimum triggering angle of the triac to obtain controllable output voltage is

A

15°

B

30°

C

45°

D

60°

3
GATE EE 2024
Numerical
+1
-0.33

A forced commutated thyristorized step-down chopper is shown in the figure. Neglect the ON-state drop across the power devices. Assume that the capacitor is initially charged to 50 V with the polarity shown in the figure. The load current ($I_L$) can be assumed to be constant at 10 A. Initially, ThM is ON and ThA is OFF. The turn-off time available to ThM in microseconds, when ThA is triggered, is________ (rounded off to the nearest integer).

GATE EE 2024 Power Electronics - Choppers and Commutation Techniques Question 2 English
Your input ____
4
GATE EE 2024
Numerical
+2
-1.33

A single-phase half-controlled bridge converter supplies an inductive load with ripple free load current. The triggering angle of the converter is 60°. The ratio of the rms value of the fundamental component of the input current to the rms value of the total input current of the bridge is _________ (rounded off to 3 decimal places).

Your input ____
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