Exercise: Power Electronics

Questions for: Power Electronics

The total number of leads in SUS, SBS and SCS respectively are
A:
3, 3, 4,
B:
3, 3, 3
C:
2, 3, 3
D:
3, 3, 5
Answer: A
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The minimum gate current which can turn on SCR is called :
A:
trigger current
B:
holding current
C:
junction current
D:
breakover current
Answer: A
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A surge voltage
A:
has very high magnitude and very long duration
B:
has very high magnitude and very small duration
C:
has very high magnitude and very small duration and can be positive or negative
D:
can be only positive
Answer: C
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A string of series connected thyristors needs equalising circuit to
A:
ensure proper firing
B:
ensure proper current division
C:
ensure proper voltage division
D:
none of the above
Answer: C
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In thermal ohm's law, temperature and power loss are analogous to
A:
V and I respectively of ohm's law
B:
I and V respectively of ohm's law
C:
R and V respectively of ohm's law
D:
I and R respectively of ohm's law
Answer: B
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