Exercise: Power Electronics

Questions for: Power Electronics

Assertion (A): A GTO can be turned on and turned off by gate pulses

Reason (R): A GTO can be turned off by negative gate pulse.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R correct but R is not correct explanation of A
C:
A is correct but R is wrong
D:
A is wrong but R is correct
Answer: B
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As the firing of a thyristor is delayed, the output voltage of a controlled rectifier decreases.
A:
True
B:
False
C:
D:
Answer: A
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The use of free wheeling diode in controlled rectifier improves the waveshape of load current.
A:
True
B:
False
C:
D:
Answer: A
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When a thyristor is conducting, the voltage drop across it is about
A:
1 V
B:
10 V
C:
100 V
D:
0.1 V
Answer: A
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Inverters find applications in
A:
HVDC transmission
B:
UPS
C:
variable speed ac drives
D:
all of the above
Answer: D
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