Exercise :: Power Electronics - Section 1
26. | Current derating may be necessary when thyristors are operating in |
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Answer: Option B Explanation: Since current does not divide equally, current derating is necessary. |
27. | If duty cycle is a and the load is a resistance R, the rms value of output voltage is |
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Answer: Option B Explanation: RMS output voltage VL = a V. |
29. | Assertion (A): Power transistor has lower switching time than SCR Reason (R): Power transistor has greater switching time than SCR |
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Answer: Option D Explanation: Power transistor does not have high |
30. | A 3 kV circuit uses SCR of 800 V rating. If derating is 25%, the number of SCRs in series is |
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Answer: Option B Explanation:
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