Question 1

A BJT has values of IE = 12 mA and IB = 600 μA. What is the exact value of beta?

Accepted Answer

A)  20 
B)  21 
C)  19 
D)  None of these are correct. 
A)  20 
B)  21 
C)  19 
D)  None of these are correct. C

Question 2

-The value of IC in a transistor amplifier is determined by

Accepted Answer

A)  the values of VCC, RC, and VCE. 
B)  the value of IB for any operating region other than saturation). 
C)  the value of VCE only. 
D)  the value of VB. 
A)  the values of VCC, RC, and VCE. 
B)  the value of IB for any operating region other than saturation). 
C)  the value of VCE only. 
D)  the value of VB. B

Question 3

The higher the value of beta for a transistor, the greater the difference between the values of IC and IE.

Accepted Answer

A) True 
 B)False  False

Question 4

-An integrated transistor is:

Accepted Answer

A)  a single transistor that is packaged in its own casing. 
B)  one of a group of transistors contained in an IC package. 
C)  an IC containing transistors that have extremely high power dissipation ratings. 
D)  a special device that uses both solid state and steady-state electronics. 
A)  a single transistor that is packaged in its own casing. 
B)  one of a group of transistors contained in an IC package. 
C)  an IC containing transistors that have extremely high power dissipation ratings. 
D)  a special device that uses both solid state and steady-state electronics.

Question 5

Which of the following labels is generally used to represent dc beta on specification sheets?

Accepted Answer

A)  β 
B)  βdc 
C)  hFE 
D)  hDC 
A)  β 
B)  βdc 
C)  hFE 
D)  hDC

Question 6

Which of the following biasing combinations is not normally associated with any of the three transistor operating regions?

Accepted Answer

A)  A forward biased E-B junction and a reverse biased C-B junction 
B)  A reverse biased E-B junction and a reverse biased C-B junction. 
C)  A reverse biased E-B junction and a forward biased C-B junction. 
D)  A forward biased E-B junction and a forward biased C-B junction. 
A)  A forward biased E-B junction and a reverse biased C-B junction 
B)  A reverse biased E-B junction and a reverse biased C-B junction. 
C)  A reverse biased E-B junction and a forward biased C-B junction. 
D)  A forward biased E-B junction and a forward biased C-B junction.

Question 7

A BJT has values of IE = 15 mA and IC = 14.95 mA. What is the exact value of beta?

Accepted Answer

A)  300 
B)  299 
C)  1.003 
D)  250 
A)  300 
B)  299 
C)  1.003 
D)  250

Question 8

-An engineer is designing a television CRT control circuit. What type of transistor do you expect to see in the design?

Accepted Answer

A)  High-voltage 
B)  High-current 
C)  High-power 
D)  General purpose 
A)  High-voltage 
B)  High-current 
C)  High-power 
D)  General purpose

Question 9

VCE is measured

Accepted Answer

A)  from the collector terminal to ground. 
B)  from the collector terminal to the emitter terminal. 
C)  from the emitter terminal to ground. 
D)  from the collector-emitter junction to ground. 
A)  from the collector terminal to ground. 
B)  from the collector terminal to the emitter terminal. 
C)  from the emitter terminal to ground. 
D)  from the collector-emitter junction to ground.

Question 10

When a BJT is in cutoff, VCE is approximately equal to

Accepted Answer

A)  VCC. 
B)  ICRC. 
C)  0 V. 
D)  VE. 
A)  VCC. 
B)  ICRC. 
C)  0 V. 
D)  VE.

Question 11

-Assuming that IB = 25 μA, what is the exact value of IC?

Accepted Answer

A)  4 mA 
B)  4.975mA 
C)  5 mA 
D)  Canʹt be determined without knowing the value of RB 
A)  4 mA 
B)  4.975mA 
C)  5 mA 
D)  Canʹt be determined without knowing the value of RB

Question 12

A transistor has ratings of ICmax) = 200 mA and β = 150 to 200. What is the maximum allowable value of IB for the device?

Accepted Answer

A)  1 mA 
B)  4 mA 
C)  1.33 mA 
D)  None of these are correct. 
A)  1 mA 
B)  4 mA 
C)  1.33 mA 
D)  None of these are correct.

Question 13

IC and VCE are directly proportional.

Accepted Answer

A) True 
 B)False

Question 14

As temperature increases, beta

Accepted Answer

A)  increases. 
B)  decreases. 
C)  remains unchanged. 
A)  increases. 
B)  decreases. 
C)  remains unchanged.

Question 15

When a transistor is in saturation, VCE is approximately equal to

Accepted Answer

A)  VCC. 
B)  ICRC. 
C)  0 V. 
D)  VE. 
A)  VCC. 
B)  ICRC. 
C)  0 V. 
D)  VE.

Question 16

- Assuming that IB = 5 μA, what is the exact value of VC?

Accepted Answer

A)  3 V 
B)  3.015 V 
C)  16.985 V 
D)  17 V 
A)  3 V 
B)  3.015 V 
C)  16.985 V 
D)  17 V

Question 17

Under normal circumstances, which BJT terminal currents are approximately equal in value?

Accepted Answer

A)  IC and IB 
B)  IC and IE 
C)  IE and IB 
D)  No two currents are ever approximately equal in value 
A)  IC and IB 
B)  IC and IE 
C)  IE and IB 
D)  No two currents are ever approximately equal in value

Question 18

The BJT is a

Accepted Answer

A)  voltage-controlled device. 
B)  current-controlled device. 
C)  frequency-controlled device. 
D)  power-controlled device. 
A)  voltage-controlled device. 
B)  current-controlled device. 
C)  frequency-controlled device. 
D)  power-controlled device.

Question 19

A BJT has values of α = 0.9985 and IC = 15 mA. What is the value of IB for the component?

Accepted Answer

A)  22.5 μA 
B)  15.15 mA 
C)  14.85 mA 
D)  None of these are correct. 
A)  22.5 μA 
B)  15.15 mA 
C)  14.85 mA 
D)  None of these are correct.

Question 20

Beta β) is the ratio of

Accepted Answer

A)  collector current to emitter current. 
B)  base current to collector current. 
C)  collector current to base current. 
D)  emitter current to collector current. 
A)  collector current to emitter current. 
B)  base current to collector current. 
C)  collector current to base current. 
D)  emitter current to collector current.

Exam 6: Bipolar Junction Transistors

A BJT has values of IE = 12 mA and IB = 600 μA. What is the exact value of beta?

-The value of IC in a transistor amplifier is determined by

The higher the value of beta for a transistor, the greater the difference between the values of IC and IE.

-An integrated transistor is:

Which of the following labels is generally used to represent dc beta on specification sheets?

Which of the following biasing combinations is not normally associated with any of the three transistor operating regions?

A BJT has values of IE = 15 mA and IC = 14.95 mA. What is the exact value of beta?

-An engineer is designing a television CRT control circuit. What type of transistor do you expect to see in the design?

VCE is measured

When a BJT is in cutoff, VCE is approximately equal to

-Assuming that IB = 25 μA, what is the exact value of IC?

A transistor has ratings of ICmax) = 200 mA and β = 150 to 200. What is the maximum allowable value of IB for the device?

IC and VCE are directly proportional.

As temperature increases, beta

When a transistor is in saturation, VCE is approximately equal to

- Assuming that IB = 5 μA, what is the exact value of VC?

Under normal circumstances, which BJT terminal currents are approximately equal in value?

The BJT is a

A BJT has values of α = 0.9985 and IC = 15 mA. What is the value of IB for the component?

Beta β) is the ratio of

Fundamental Solid-State Principles

Diodes

Common Diode Applications: Basic Power Supply Circuits

Common Diode Applications: Clippers, Clampers, Voltage Multipliers, and Displays

Special Applications Diodes

DC Biasing Circuits

Introduction to Amplifiers

Common-Emitter Amplifiers

Other BJT Amplifiers

Power Amplifiers

Field-Effect Transistors

Mosfets

Amplifier Frequency Response

Operational Amplifiers

Additional Op-Amp Applications

Tuned Amplifiers

Oscillators

Solid-State Switching Circuits

Thyristors and Optoelectronics Devices

Discrete and Integrated Voltage Regulators

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