Question:

Most of the electrons in the base of an NPN transistor flow:

A.

into the collector

B.

into the emitter

C.

out of the base lead

D.

into the base supply

Answer» a. into the collector

Question:

If VD is less than expected (normal) for a self-biased JFET circuit, then it could be caused by a(n)

A.

open rg.

B.

open gate lead.

C.

fet internally open at gate.

D.

all of the above

Answer» d. all of the above

Question:

What is the most important r parameter for amplifier analysis?

A.

rb′

B.

rc′

C.

re′

D.

none of the above

Answer» c. re′

Question:

Which of the following elements are important in determining the gain of the system in the high-frequency region?

A.

interelectrode capacitances

B.

wiring capacitances

C.

miller effect capacitance

D.

all of the above

Answer» d. all of the above

Question:

An emitter-follower amplifier has an input impedance of 107 kΩ. The input signal is 12 mV. The approximate output voltage is (common-collector)

A.

8.92 v

B.

112 mv

C.

12 mv

D.

8.9 mv

Answer» c. 12 mv

Question:

You have a need to apply an amplifier with a very high power gain. Which of the following would you choose?

A.

common-collector

B.

common-base

C.

common-emitter

D.

emitter- follower

Answer» c. common-emitter

Question:

The Bode plot is applicable to

A.

all phase network

B.

minimum phase network

C.

maximum phase network

D.

lag lead network

Answer» b. minimum phase network

Question:

When transistors are used in digital circuits they usually operate in the

A.

active region

B.

breakdown region

C.

saturation and cutoff regions

D.

linear region

Answer» c. saturation and cutoff regions

Question:

A current ratio of IC/IE is usually less than one and is called

A.

omega

B.

beta

C.

theta

D.

alpha

Answer» d. alpha