VCE approximately equals ________ when a transistor switch is cut off. VCC VB 0.

3. The input resistance, R_in of a common-collector amplifier, consists of ____________.
Options
A. R_in = R_E � AC Current Gain
B.
C. R_in = R_E � ɑ
D. none of the above

Discuss

Correct Answer: R_in = R_E � AC Current Gain

4. The signal voltage gain of an amplifier, A_V, is defined as __________.
Options
A.
B. A_V = I_C x R_C
C.
D.

Discuss

Correct Answer:

5. Base bias provides _________.
Options
A. a very stable Q point
B. a very unstable Q point
C. no current gain
D. zero current in the base and collector circuits

Discuss

Correct Answer: a very unstable Q point

6. The phase difference between the input and output ac voltage signals of a common-emitter amplifier is __________.
Options
A. 0�
B. 90�
C. 180�
D. 360�

Discuss

Correct Answer: 180�

7. The input resistance of the base of an emitter-follower is usually _________.
Options
A. very low
B. very high
C. shorted to ground
D. open

Discuss

Correct Answer: very high

8. The silicon-controlled rectifier (SCR) is a three-layer device consisting of a gate, an anode, and a cathode.
Options
A. True
B. False

Discuss

Correct Answer: False

Explanation:

A silicon-controlled rectifier (or semiconductor-controlled rectifier) is a four-layer solid state device that controls current. The name "silicon controlled rectifier" or SCR is General Electric's trade name for a type of thyristor. The SCR was developed by a team of power engineers led by Gordon Hall and commercialized by Frank W. "Bill" Gutzwiller in 1957.

9. A transducer does not convert energy from one form to another.
Options
A. True
B. False

Discuss

Correct Answer: False

10. A TRIAC can be triggered or activated by either a positive or a negative input gate trigger.
Options
A. True
B. False

Discuss

Correct Answer: True

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V_CE approximately equals ________ when a transistor switch is cut off.