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Electronics and Communication Engineering - Power Electronics

Exercise : Power Electronics - Section 5
26.
When an SCR is in forward blocking mode, the applied voltage
appears across only one junction
is equally shared by two junctions
is equally shared by three junctions
may appear across one or more junctions
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
In sinusoidal PWM for inverters the width of different pulses are not the same.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
A class D chopper
can operate in first quadrant only
can operate in second quadrant only
can operate in either first or fourth quadrant
can operate in all the quadrants
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The symbol in figure is for
UJT
PUT
SCS
SBS
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
The efficiency of a chopper circuit is about
80% or more
around 50%
around 20%
around 5%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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