Power Electronics MCQ Questions and Answers Quiz

131. Voltage commutation circuit can be converted into a current commutation by interchanging the positions of

  1. Capacitor and SCR
  2. Inductor and capacitor
  3. Diode and capacitor
  4. Capacitor and load

132. When a UJT is turned ON, the resistance between emitter terminal and lower base terminal …………….

  1. Is decreased
  2. Is increased
  3. Remains the same
  4. None of the above

133. When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ………………..

  1. Low
  2. Extremely low
  3. High
  4. None of the above

134. When the temperature increases, the inter-base resistance (RBB) of a UJT ………….

  1. Decreases
  2. Remains the same
  3. Increases
  4. None of the above

135. When the temperature increases, the intrinsic stand off ratio ……….

  1. Decreases
  2. Essentially remains the same
  3. Increases
  4. None of the above

136. Which of the following is not a characteristic of UJT?

  1. Negative resistance
  2. Peak-point voltage
  3. Intrinsic stand off ratio
  4. Bilateral conduction

137. With increase in firing angle

  1. Harmonic distortion increases and quality of input current decreases
  2. Harmonic distortion decreases and quality of input current increases
  3. Both harmonic distortion and quality of input current increases
  4. Both harmonic distortion and quality of input current decreases
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MCQ Multiple Choice Questions and Answers on Power Electronics

Power Electronics Question and Answer

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