Exercise: Power Electronics

Questions for: Power Electronics

When a power diode is conducting, the voltage drop across it is about
A:
I V
B:
5 V
C:
20 V
D:
50 V
Answer: A
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A dc chopper is feeding an RLE load. The condition for maximum ripple is
A:
a = 1
B:
a = 0.8
C:
a = 0.5
D:
a < 0.5
Answer: A
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In a single phase full wave converter (M-2 connection) feeding on R-L load the input voltage is v = Vm sin ωt. The expression for rms output voltage is
A:
B:
C:
D:
Answer: B
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Which of the following devices has metal-silicon junction?
A:
General purpose power diode
B:
Schottky diode
C:
SCR
D:
MOSFET
Answer: B
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Surge current rating of an SCR is
A:
the maximum repetitive surge current in which the SCR can withstand
B:
the maximum non-repetitive surge current in which the SCR can withstand
C:
the maximum repetitive or non repetitive surge current in which the SCR can withstand
D:
the maximum surge current in which the SCR can withstand if both surge current and steady current exist together
Answer: B
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