Power Semiconductor Devices and Their Applications MCQs
Practice free Power Semiconductor Devices and Their Applications multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 224 questions — no login required.
Question 127easy
A continuous signal and a pulse are applied to the gate of thyristor. The thyristor will turn-on faster with
Question 128easy
A single phase ac regulator fed from 50 Hz system supplies a load having resistance and inductance of 4.0 ohms and 12.73 mH respectively. The control range of firing angle is
Question 129easy
It is required to drive a dc shunt motor at different speeds in both the directions (forward and reverse) and also to brake it in both the directions. Which one of the following would you use?
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Question 130easy
The frequency of ripple in the output voltage of a three-phase half controlled bridge rectifier depends on the
Question 131easy
A fully controlled 3-phase converter has to supply an output voltage of 270 volts. The minimum secondary line voltage of the input transformer is volts.
Question 132easy
In the circuit shown in Fig. 8.8 the resistance R is varied from 0 to co.
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Question 133easy
The interbase resistance of a UJT is
Question 134easy
VI characteristic of emitter of a UJT is
Question 135easy
An UJT used for triggering an SCR has the supply voltage VBB = 25 V. The inrinsic stand off ratio, n = 0.75. The UJT will conduct when the bias voltage Vz is