PNPN - General Questions (3)

Directions to Solve

PNPN - General Questions

17.

Which of the transistors of an SCR are conducting when the SCR is fired and is in the conduction mode?

A.	npn
B.	pnp
C.	Both npn and pnp
D.	Neither npn nor pnp

Answer: Option C

Explanation:

No answer description available for this question.

18.

This symbol is an example of a(n) ________.

mcq17_01200

A.	SCR
B.	SCS
C.	GTO
D.	DIAC

Answer: Option A

Explanation:

No answer description available for this question.

19.

Which of the following devices has nearly the same turn-on time as turn-off time?

A.	SCR
B.	GTO
C.	SCS
D.	LASCR

Answer: Option B

Explanation:

No answer description available for this question.

20.

This symbol is an example of a(n) ________.

mcq17_02300

A.	SCR
B.	SCS
C.	GTO
D.	diac

Answer: Option C

Explanation:

No answer description available for this question.

21.

What is the frequency range of application of SCRs?

A.	About 10 kHz
B.	About 50 kHz
C.	About 250 kHz
D.	About 1 mHz

Answer: Option B

Explanation:

No answer description available for this question.

22.

What is the range of the turn-on times in high-power SCR devices?

A.	30 s to 100 s
B.	10 s to 25 Â s
C.	5 Â s to 8 Â s
D.	1 Â s to 5 Â s

Answer: Option B

Explanation:

No answer description available for this question.

23.

Which of the following devices has the smallest turn-off time?

A.	SCR
B.	GTO
C.	SCS
D.	LASCR

Answer: Option B

Explanation:

No answer description available for this question.

24.

Which one of the SCR terminals fires the SCR?

A.	Anode
B.	Cathode
C.	Gate
D.	All of the above

Answer: Option C

Explanation:

No answer description available for this question.

PNPN - General Questions (3)

PNPN - General Questions

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