1
GATE EE 1996
MCQ (Single Correct Answer)
+1
-0.3
Which of the following does not cause permanent damage of an $$SCR?$$
A
High current
B
High rate of rise of current
C
High temperature rise
D
High rate of rise of voltage
2
GATE EE 1996
MCQ (Single Correct Answer)
+1
-0.3
In a $$3$$ - phase controlled bridge rectifier, with an increase of overlap angle the output $$dc$$ voltage
A
Decreases
B
Increases
C
Does not change
D
Depends upon load inductance
3
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
4
GATE EE 1996
MCQ (Single Correct Answer)
+1
-0.3
For a $$500$$ Hz frequency excitation, a $$50$$ km short power line will be modeled as
A
Short line
B
Medium line
C
Long line
D
Data insufficient for decision.
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