Home / Power Semiconductor Devices – 1 – 3

Power Semiconductor Devices – 1 – 3

11. A UJT has ……………………

(a) two pnjunctions
(b) one pnjunction
(c) three pnjunctions
(d) none of the above

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

12. The normal way to turn on a diac is by …………

(a) gate current
(b) gate voltage
(c) breakover voltage
(d) none of the above

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

13. A diac is ………… switch.

(a) an a.c.
(b) a d.c.
(c) a mechanical
(d) none of the above

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

14. In a UJT,the p-type emitter is ………… doped.

(a) lightly
(b) heavily
(c) moderately
(d) none of the above

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

15. Power electronics essentially deals with control of a.c. power at …………

(a) frequencies above 20 kHz
(b) frequencies above 1000 kHz
(c) frequencies less than 10 Hz
(d) 50 Hz frequency

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

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