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 145easy
An SCR is rated at 75 A peak, 20 A average. The gre astest possible delay in the trigger angle if the dc is a rated value is
Question 146easy
A SCR has an anode supply of sine voltage 200 V rms., 50 Hz applied through a 1000 resistor and fired at an angle of 60?. Assuming no voltage drop, the rms value of the output voltage is
Question 147easy
A dc source of 100 V supplies a purely inductive load 0.1 H. The controller is a thyristor in series with the source and load. The latching current specified is 100 mA. The minimum width of the gating pulse to ensure thyristor turn on is
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Question 148easy
A thyristor is triggered by apulse train of 5 KHz. The duty ratio is 0.4. If the allowable averaige power is 100 W. The maximum allowable gate drive power is
Question 149easy
In a SCR,
Question 150easy
An inductance is inserted in the load circuit of SCR.
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Question 151easy
A half wave SCR controlled circuit with RL 50f1 conducts for 90? for an applied voltage of 800 V sinosoidal rms. If the SCR voltage drop is negligible, the power dissipated by the load is
Question 152easy
A half wave SCR controlled circuit with a load resistor RL = 1012 has an applied voltage of 300 V rms for a conduction angle of 60?. The reading of a true rms reading ammeter is
Question 153easy
The ratio of gate current to condinuous anode current in a SCR to switch on is