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 2011
MCQ (Single Correct Answer)
+1
-0.3
Circuit turn-off time of an $$SCR$$ is defined as the time
A
taken by the $$SCR$$ turn of
B
required for the $$SCR$$ current to become zero
C
for which the $$SCR$$ is reverse biased by the commutation circuit
D
for which the $$SCR$$ is reverse biased to reduce its current below the holding current
2
GATE EE 2010
MCQ (Single Correct Answer)
+1
-0.3
Figure shows a composite switch consisting of a power transistor $$(BJT)$$ in series with a diode. Assuming that the transistor switch and the diode are ideal, the $$I$$-$$V$$ characteristic of the composite switch is GATE EE 2010 Power Electronics - Power Semiconductor Devices Question 19 English
A
GATE EE 2010 Power Electronics - Power Semiconductor Devices Question 19 English Option 1
B
GATE EE 2010 Power Electronics - Power Semiconductor Devices Question 19 English Option 2
C
GATE EE 2010 Power Electronics - Power Semiconductor Devices Question 19 English Option 3
D
GATE EE 2010 Power Electronics - Power Semiconductor Devices Question 19 English Option 4
3
GATE EE 2009
MCQ (Single Correct Answer)
+1
-0.3
An $$SCR$$ is considered to be a semi - controlled device because
A
it can be turned OFF but not ON with a gate pulse
B
it conducts only during one half - cycle of an alternating current wave
C
It can be turned ON but not OFF with a gate pulse
D
it can be turned ON only during one half - cycle of an alternating voltage wave
4
GATE EE 2005
MCQ (Single Correct Answer)
+1
-0.3
The conduction loss versus device current characteristic of a power $$MOSFET$$ is best approximated by
A
a parabola
B
a straight line
C
a rectangular hyperbola
D
an exponentially decaying function
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