Electronic Devices - PNPN

Exercise :: PNPN - Filling the Blanks

6. 

In general, the triggering (turn-on) anode gate current is ________ the required cathode gate current.

A. larger than
B. the same as
C. smaller than
D. None of the above

Answer: Option A

Explanation:

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7. 

The four-layer devices with a control mechanism are commonly referred to as ________.

A. thyristors
B. transistors
C. diodes
D. None of the above

Answer: Option A

Explanation:

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8. 

________ is(are) example(s) of applications of phototransistors.

A. Punch-card readers
B. Lighting control (for example, on highways)
C. Level indication
D. All of the above

Answer: Option D

Explanation:

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9. 

________ in light intensity corresponds with ________ in collector current.

A. An increase, an increase
B. An increase, a decrease
C. A decrease, an increase
D. None of the above

Answer: Option A

Explanation:

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10. 

A(n) ________ can be triggered in either direction.

A. SCR
B. Shockley diode
C. diac
D. SCS

Answer: Option C

Explanation:

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