Exercise: Power Electronics

Questions for: Power Electronics

In an n stage high frequency series inverter having a time period T, each stage is active for a time interval of
A:
T
B:
C:
D:
Answer: B
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In a full bridge circuit supplying an RLC under damped circuit
A:
the waveshapes of output voltage and load current are square
B:
the waveshapes of output voltage and load current are sinusoidal
C:
the waveshapes of output voltage is square but the waveshape of load current is nearly sinusoidal
D:
none of the above
Answer: C
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A class B chopper operates in third quadrant.
A:
True
B:
False
C:
D:
Answer: B
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For a single phase half wave converter feeding a resistive load, the firing angle a. The waveshape in below figure is for
A:
output voltage
B:
input voltage
C:
voltage drop across thyristor
D:
none of the above
Answer: D
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In a dual converter operated in circulating current mode, the circulating current flows
A:
when load current is zero
B:
when load current is non-zero
C:
even when load current is zero
D:
none of the above
Answer: C
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