Electronic Devices - PNPN

Exercise :: PNPN - General Questions

16. 

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:

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17. 

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

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

Answer: Option A

Explanation:

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18. 

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:

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19. 

For an SCS, a ________ pulse at the anode gate turns the device on, while a ________ pulse will turn it off.

A. negative, positive
B. positive, negative

Answer: Option A

Explanation:

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20. 

An advantage of the SCR over the SCS is the reduced turn-off time.

A. True
B. False

Answer: Option B

Explanation:

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