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Power Electronics MCQ Questions & Answers | ECE

Learn Power Electronics MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Power Electronics MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-10 section-1

Each section contains 100 MCQs on Power Electronics .
91
How many SCR are to be connected in series with 800 V rating to be used for 3 kV circuit using derating factor of 15%?
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Answer & Solution
Answer: Option C
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92
A single phase voltage source square wave inverter feeds pure inductive load. The waveform of the load current will be
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Answer & Solution
Answer: Option D
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93
A circuit uses SCR of 800 V rating after which the derating is 25% then the SCR in series
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Answer & Solution
Answer: Option B
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94
In a thyristor DC chopper, which type of commutation results in best performance?
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Answer & Solution
Answer: Option A
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95
An ideal thyristor is driving an R-L load of impedance Z. Input AC voltage Vs = Vmsinωmt. If thyristor if fired at an input phase angle of 90°. What will be the output voltage and output current across R-L load as the instant of firing?
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Answer: Option D
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96
A thyristor equivalent of a thyratron tube is a
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Answer: Option C
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97
Buck-Boost converter is one of the,
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Answer: Option D
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98
A single phase one pulse controlled circuit has a resistance and counter emf load 200sin(512t) as the source voltage for a load counter emf of 100 V, the range of firing angle control will be:
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Answer & Solution
Answer: Option D
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99
In UJT, maximum value of charging resistance is associated with
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Answer: Option A
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100
Match List-I with List-II and select the correct answer using the options given below:
List-I (Device) List-II (Associated Term)
a. Diode 1. Pinch off voltage
b. SCR 2. Holding current
c. BJT 3. Forward resistance
d. FET 4. Active region
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Answer & Solution
Answer: Option C
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