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 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
2
GATE EE 2004
MCQ (Single Correct Answer)
+1
-0.3
A bipolar junction transistor $$(BJT)$$ is used as a power control switch by biasing it in the cut-off region (OFF state) or in the saturation region (ON state). In the ON state, for the $$BJT.$$
A
both the base - emitter and base-collector junctions are reverse biased
B
the base - emitter junctions is reverse biased, and the base-collector junction is forward biased
C
the base - emitter junction is forward biased, and the base-collector junction is reverse biased
D
both the base - emitter and base-collector junctions are forward biased.
3
GATE EE 2004
MCQ (Single Correct Answer)
+1
-0.3
The triggering circuit of a thyristor is shown in figure. The thyristor requires a gate current of $$10$$ $$mA,$$ for guaranteed turn-on. The value of $$R$$ required for the thyristor to turn on reliably under all conditions of $${V_b}$$ variation is GATE EE 2004 Power Electronics - Power Semiconductor Devices Question 22 English
A
$$10000\,\Omega $$
B
$$1600\,\Omega $$
C
$$1200\,\Omega $$
D
$$800\,\Omega $$
4
GATE EE 2003
MCQ (Single Correct Answer)
+1
-0.3
Figure shows a thyristor with the standard terminations of anode $$(A),$$ cathode $$(K),$$ gate $$(G)$$ and the different junctions named $$J1, J2,$$ and $$J3$$. When the thyristor is turned on and conducting GATE EE 2003 Power Electronics - Power Semiconductor Devices Question 25 English
A
$$J1$$ and $$J2$$ are forward biased and $$J3$$ is reverse biased
B
$$J1$$ and $$J3$$ are forward biased and $$J2$$ is reverse biased
C
$$J1$$ is forward biased and $$J2$$ and $$J3$$ are reverse biased
D
$$J1, J2,$$ and $$J3$$ are all forward biased
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