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Electronics and Communication Engineering - Power Electronics

Exercise : Power Electronics - Section 6
6.
A single phase half wave rectifier is feeding a resistive load. As firing angle is increased
dc output voltage and rms output voltage decrease in the same proportion
dc output voltage and rms output voltage decrease
dc output voltage and rms output voltage increase
dc output voltage and rms output voltage increase in the same proportion
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
A cycloconverter for single phase operation has
one positive group and one negative group converters
two positive group and two negative group converters
three positive group and three negative group converters
any of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
A chopper is a high efficiency circuit.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
The difference between resonant commutation and self commutation is
both these methods are based on entirely different principles
in resonant commutation, the commutating elements carry load current but in self commutation, the commutating elements do not carry load current
resonant commutation uses L and C but self commutation uses only capacitor
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
If 0.5 T is the time period of oscillations and Toff is the time between turn off of one thyristor and turn on of second thyristor, the frequency of output f of a series inverter is
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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