Power Electronics MCQs Part 7

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Electrical Engineering MCQs – Power Electronics MCQ Questions Part 7

The reliability of a string of SCRs can be measured using

The reliability of a string of SCRs can be measured using

  1. Derating factor
  2. Factor of safety
  3. Reliability factor
  4. String efficient

Correct answer: 1. Derating factor

Gate circuit or triggering circuit of a thyristor is

Gate circuit or triggering circuit of a thyristor is

  1. Any of above
  2. High power circuit
  3. Lower power circuit
  4. Magnetic circuit

Correct answer: 3. Lower power circuit

During reverse blocking mode of a thermistor

During reverse blocking mode of a thermistor

  1. Junction J1 and J2 is in forward bias and J3 is in reverse bias
  2. Junction J1, J3 is in reverse bias and J2 is in forward bias
  3. Junction J2 is in reverse bias and J1, J3 is in forward bias
  4. Junction J3 is in forward bias and J1, J2 in reverse bias

Correct answer: 2. Junction J1, J3 is in reverse bias and J2 is in forward bias

SITH is also known as

SITH is also known as

  1. Filled controlled diode
  2. Filled controlled rectifier
  3. Silicon controlled rectifier
  4. None of above

Correct answer: 1. Filled controlled diode

The typical time of rising ranges between

The typical time of rising ranges between

  1. 1 – 4 µs
  2. 4 – 20 µs
  3. 40 – 60 µs
  4. 0.015

Correct answer: 1. 1 – 4 µs

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