Power Electronics
Choppers and Commutation Techniques
Marks 1Marks 2Marks 5
Single and Three Phase Rectifier
Marks 1Marks 2Marks 5
Power Semiconductor Devices
Marks 1Marks 2
Ac Voltage Controllers
Marks 1Marks 2Marks 5
1
GATE EE 2004
MCQ (Single Correct Answer)
+1
-0.3
The circuit in figure shows a full-wave rectifier. The input voltage is $$230$$ $$V$$ $$(rms)$$ single-phase ac. The peak reverse voltage across the diodes $${D_1}$$ and $${D_2}$$ is GATE EE 2004 Power Electronics - Single and Three Phase Rectifier Question 53 English
A
$$100\sqrt 2 \,V$$
B
$$100$$ $$V$$
C
$$50\sqrt 2 \,V$$
D
$$50$$ $$V$$
2
GATE EE 2004
MCQ (Single Correct Answer)
+1
-0.3
The circuit in figure shows a $$3$$ $$-$$ phase half $$-$$ wave rectifier. The source is a symmetrical, $$3$$ $$-$$ phase four $$-$$ wire system. The line-to-line voltage of the source is $$100 V.$$ The supply frequency is $$400$$ $$Hz.$$ The ripple frequency at the output is GATE EE 2004 Power Electronics - Single and Three Phase Rectifier Question 52 English
A
$$400$$ $$Hz$$
B
$$800$$ $$Hz$$
C
$$1200$$ $$Hz$$
D
$$2400$$ $$Hz$$
3
GATE EE 2003
MCQ (Single Correct Answer)
+1
-0.3
A fully controlled natural commuted $$3$$-phase bridge rectifier is operating with a firing angle $$\alpha = {30^0}.$$ The peak to peak voltage ripple expressed as a ratio of the peak output $$dc$$ voltage at the output of the converter bridge is
A
$$0.5$$
B
$$\sqrt 3 /2$$
C
$$1 - \sqrt 3 /2$$
D
$$\sqrt 3 - 1$$
4
GATE EE 2002
MCQ (Single Correct Answer)
+1
-0.3
A six pulse thyristor rectifier bridge is connected to a balanced $$50Hz$$ three phase $$ac$$ source. Assuming that the $$dc$$ output current of the rectifier is constant, the lowest frequency harmonic component in the $$ac$$ source line current is
A
$$100$$ $$Hz$$
B
$$150$$ $$Hz$$
C
$$250$$ $$Hz$$
D
$$300$$ $$Hz$$
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement