PYQs Based test 24: Power Electronics

Topics Covered

Sample Questions from this Test

1. Figure shows 4 electronic switches (i), (ii), (iii) and (iv). Which of the switches can blockVoltages of either polarity(applied between terminals ‘a’ and ‘b’) when the active device is in OFF state?
   
   
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2. The output voltage of a single-phase full bridge voltage source inverter is controlled by unipolar PWM with one pulse per half cycle. For the fundamental rms component of output voltage to be 75% of DC voltage, the required pulse width in degrees (round off up to one decimal place) is __________.
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3. A buck-boost DC-DC converter, shown in the figure below, is used to convert $24V$ battery voltage to $36V$ DC voltage to feed a load of $72W$. It is operated at $20kHz$ with an inductor of $2mH$ and output capacitor of $1000\mu F$. All devices are considered to be ideal. The peak voltage across the solid-state switch (S), in volt, is ____________.
   
   
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Test Instructions

• The test contains 20 questions and a total of 32 marks.
• You will have 180 minutes to complete the test. The timer cannot be paused once started.
• Negative marking: 0.25 mark(s) deducted per wrong answer.
• Use the question palette to mark questions for review and navigate freely.
• Detailed solutions and analytics are available immediately after submission.
• This is a free practice test. No login required to attempt.