1000+ Power Electronics Objective Type Questions and Answers Pdf - 1
Question: 1
Line regulation is determined by
(A) change in load resistance and output voltage
(B) load current and zener current
(C) change in output voltage and input voltage
(D) load current
Ans: C
change in output voltage and input voltage
Question: 2
In a type chopper, the maximum value of ripple current is
(A) directly proportional to chopping frequency only
(B) directly proportional to the circuit inductance only
(C) inversely proportional to chopping frequency and the circuit inductance
(D) directly proportional to chopping frequency and inversely proportional to the circuit inductance
Ans: C
inversely proportional to chopping frequency and the circuit inductance
Question: 3
On increasing the number of pulses in rectification, the form factor, ripple frequency and efficiency.
(A) increases, decreases and increases respectively
(B) decreases, increases and increases respectively
(C) decreases, decreases and increases respectively
(D) all increases
Ans: B
decreases, increases and increases respectively
Question: 4
A four quadrant operation requires
(A) two semi converters connected back to back
(B) two full converters connected in parallel
(C) two semi-converters is series
(D) two full converters connected back to back
Ans: A
two semi converters connected back to back
Question: 5
In a thyristor, anode current is made up of
(A) electrons and holes
(B) electrons only
(C) holes only
(D) none of the above
Ans: A
electrons and holes
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