1
GATE EE 2014 Set 2
Numerical
+1
-0
A step-up chopper is used to feed a load at $$400$$ $$V$$ $$dc$$ from a $$250$$ $$V$$ $$dc$$ source. The inductor current is continuous. If the ‘off’ time of the switch is $$20\,\,\mu s,$$ the switching frequency of the chopper in $$kHz$$ is ________.
Your input ____
2
GATE EE 2010
MCQ (Single Correct Answer)
+1
-0.3
The power electronic converter shown in the figure has a single-pole double-throw switch. The pole $$P$$ of the switch is connected alternately to throws $$A$$ and $$B.$$ The converter shown is a GATE EE 2010 Power Electronics - Choppers and Commutation Techniques Question 35 English
A
step-down chopper (buck converter)
B
half-wave rectifier
C
step-up chopper (boost converter)
D
full-wave rectifier
3
GATE EE 2002
MCQ (Single Correct Answer)
+1
-0.3
A step down chopper is operated in the continuous conduction mode in steady state with a constant duty ratio $$D.$$ If $${V_0}$$ is the magnitude of the $$dc$$ output voltage and if $${V_s}$$ is the magnitude of the $$dc$$ input voltage, the ratio $${{{V_0}} \over {{V_s}}}$$ is given by
A
$$D$$
B
$$1-D$$
C
$${1 \over {1 - D}}$$
D
$${D \over {1 - D}}$$
4
GATE EE 1996
MCQ (Single Correct Answer)
+1
-0.3
In a thyristor $$dc$$ chopper which type of commutation results in best performance?
A
Voltage commutation
B
Current commutation
C
Load commutation
D
Supply commutation
GATE EE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12