1
GATE EE 2002
MCQ (Single Correct Answer)
+2
-0.6
A three phase thyristor bridge rectifier is used in a $$HVDC$$ link. The firing angle $$\alpha $$ (as measured from the point of natural commutation) is constrained to lie between $${5^ \circ }$$ and $${30^ \circ }$$. If the $$dc$$ side current and $$ac$$ side voltage magnitude are constant, which of the following statements is true (neglect harmonics in the $$ac$$ side current and commutation overlap in your analysis)
A
Reactive power absorbed by the rectifier is maximum when $$\alpha = {5^ \circ }$$
B
Reactive power absorbed by the rectifier is maximum when $$\alpha = {30^ \circ }$$
C
Reactive power absorbed by the rectifier is maximum when $$\alpha = {15^ \circ }$$
D
Reactive power absorbed by the rectifier is maximum when $$\alpha = {15^ \circ }$$
2
GATE EE 2002
MCQ (Single Correct Answer)
+2
-0.6
In the single phase diode bridge rectifier shown in fig, the load resistor is
$$R = 50\Omega .$$ The source voltage is
$$V = 200sin\omega t,$$
Where $$\omega = 2\pi \times 50$$ radians per second. The power dissipated in the load resistor $$R$$ is GATE EE 2002 Power Electronics - Single and Three Phase Rectifier Question 36 English
A
$${{3200} \over \pi }W$$
B
$${{400} \over \pi }W$$
C
$$400\,W$$
D
$$800\,W$$
3
GATE EE 2001
MCQ (Single Correct Answer)
+2
-0.6
A half-wave thyristor converter supplies a purely inductive load, as shown in figure. If the triggering angle of the thyristor is $${120^ \circ }$$, the extinction angle will be GATE EE 2001 Power Electronics - Single and Three Phase Rectifier Question 38 English
A
$${240^ \circ }$$
B
$${180^ \circ }$$
C
$${200^ \circ }$$
D
$${120^ \circ }$$
4
GATE EE 1998
MCQ (Single Correct Answer)
+2
-0.6
When the firing angle $$\alpha $$ of a single phase, fully controlled rectifier feeding constant $$d.c.$$ current into a load is $${30^ \circ }$$ , the displacement power factor of the rectifier is
A
$$1$$
B
$$0.5$$
C
$${1 \over {\sqrt 3 }}$$
D
$${{\sqrt 3 } \over 2}$$
GATE EE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12