chapter 4 ME327

Réussis tes devoirs et examens dès maintenant avec Quizwiz!

True

. For operation in the linear or active region, the base-emitter junction of a transistor is forwardbiased.

(b) decrease

. If the amplitude of Vin in Figure 4-22 is decreased, the ac output voltage amplitude will

(a) increase

. If the base resistor in Figure 4-38 is open, the transistor collector voltage will

(a) increase

. If the emitter in Figure 4-38 becomes disconnected from ground, the collector voltage will

(d) base, emitter, collector

1. The three terminals of a bipolar junction transistor are called

a) increase

1. if a transistor with a higher bDC is used in Figure 4-9, the collector current will

(c) an internal ac resistance

10. When a lowercase is used in relation to a transistor, it refers to

False

11. Amplification is the output voltage divided by the input current.

True

12. A transistor in cutoff acts as an open switch.

(b) switch

12. When operated in cutoff and saturation, the transistor acts like a

(f) c and d - maximum and equal to VCC

13. In cutoff, VCE is

(c) minimum

14. In saturation, VCE is

(b) directly proportional to light intensity

17. In a phototransistor, base current is

(d) both (b) an LED and a photodiode (c) an LED and a phototransistor

19. An optocoupler usually consists of

(a) increase

2. If a transistor with a higher bDC is used in Figure 4-9, the emitter current will

(a) positive with respect to the emitter

3. For operation as an amplifier, the base of an npn transistor must be

True

8. When a transistor is saturated, the collector current is maximum.

(b) decrease

9. If the transistor in Figure 4-38 is open from collector to emitter, the voltage across RC will

False

9. bDC and hFE are two different transistor parameters.

(c) OL

A DMM measuring on open transistor junction shows

True

A bipolar junction transistor has three terminals

False

Cutoff and saturation are the two normal states of a linear transistor amplifier.

(c) 50

If IC is 50 times larger than IB, then bDC is

c) not change

If VCC in Figure 4-16 is increased, the base current will

(c) not change

If a transistor with a higher bDC is used in Figure 4-9, the base current will

(c) 50

If the output of a transistor amplifier is 5 V rms and the input is 100 mV rms, the voltage gain is

c) not change

If the transistor in Figure 4-24 is saturated and the base current is increased, the collector current will

(a) increase

If the transistor in Figure 4-38 is open from collector to emitter, the collector voltage will

(b) 110

In a given transistor amplifier, and the voltage gain is

(c) emitter and collector

In a pnp transistor, the p regions are

(a) VCC

In a transistor amplifier, if the base-emitter junction is open, the collector voltage is

(b) will not affect the collector current

Once in saturation, a further increase in base current will

(a) increase

RC in Figure 4-24 is reduced in value, the value of IC(sat) will

(b) 0.7 V

The approximate voltage across the forward-biased base-emitter junction of a silicon BJT is

(a) current gain

The bDC of a transistor is its

(a) forward-reverse

The bias condition for a transistor to be used as a linear amplifier is called

(a) greater than the base current (c) greater than the collector current / (d) a and c

The emitter current is always

(a) IC bDCIl

The relationship between the collector current and a light-generated base current is

False

The three regions of a BJT are base, emitter, and cathode

(b) IB IC(sat)/bDC

To saturate a BJT,

True

Two types of BJT are npn and pnp

True

Voltage gain of a transistor amplifier depends on the collector resistor and the internal ac resistance

False

base current and collector current are approximately equal.

(b) decrease

if VBB is reduced in Figure 4-16, the collector current will

False

the dc voltage gain of a transistor is designated as bDC


Ensembles d'études connexes

You are a newly trained first aid provider responding at work to a report of someone who has collapsed. Which of the following best describes your role in a medical emergency?

View Set

Задачі для практики

View Set

Chapter 13 Environmental Science Test

View Set

Ch 17: Nursing Care of a Postpartal Family

View Set

Google for Education Docs & Drive

View Set

Solve using Substitution or Elimination

View Set