ISRO Electrical Engineering (EE) 2023 - Question 72

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The turn-on time of a SCR with inductive load is 20 micro seconds. The pulse train is 2.5 kHz with a mark/space ratio of 1/10, then the SCR will

  • A. turn on
  • B. not turn on
  • C. turn on if inductance is removed
  • D. turn on if pulse frequency is increased to four times

Answer: A. turn on

Explanation: Because gate trigger pulse duration exceeds required turn-on time and provides sufficient current, the SCR successfully turns on.

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