Floyd Self-test in Transistor Bias Circuits

(Last Updated On: December 8, 2017)

Floyd Self-test in Chapter 5 of Electronic Devices

This is the Self-test in Chapter 5: Transistor Bias Circuits from the book Electronic Devices Conventional Current Version, 9th edition by Thomas L. Floyd. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam.

Floyd Self-test Chapter 5 Topic Outline

  • Floyd Self-test in Transistor Bias Circuits
  • Floyd Self-test in The DC Operating Point
  • Floyd Self-test in Voltage-Divider Bias
  • Floyd Self-test in Other Bias Methods

Start Practice Exam Test Questions

Choose the letter of the best answer in each questions.

1. The maximum value of collector current in a biased transistor is

  • (a) βdcIB
  • (b) IC(sat)
  • (c) greater than IE
  • (d) IE – IB

2. Ideally, a dc load line is a straight line drawn on the collector characteristic curves between

  • (a) the Q-point and cutoff
  • (b) the Q-point and saturation
  • (c) VCE(cutoff) and IC(sat)
  • (d) IB = 0 and IB = IC / βdc

3. If a sinusoidal voltage is applied to the base of a biased npn transistor and the resulting sinusoidal collector voltage is clipped near zero volts, the transistor is

  • (a) being driven into saturation
  • (b) being driven into cutoff
  • (c) operating nonlinearly
  • (d) answers (a) and (c)
  • (e) answers (b) and (c)

4. The input resistance at the base of a biased transistor depends mainly on

  • (a) βdc
  • (b) RB
  • (c) RE
  • (d) βdc and RE

5. In a voltage-divider biased transistor circuit such as in Figure 5–13, RIN(BASE) can generally be neglected in calculations when

  • (a) RIN(BASE) > R2
  • (b) R2 > 10RIN(BASE)
  • (c) RIN(BASE) > 10R2
  • (d) R1 << R2

6. In a certain voltage-divider biased npn transistor, VB is 2.95 V. The dc emitter voltage is approximately

  • (a) 2.25 V
  • (b) 2.95 V
  • (c) 3.65 V
  • (d) 0.7 V

7. Voltage-divider bias

  • (a) cannot be independent of βdc
  • (b) can be essentially independent of βdc
  • (c) is not widely used
  • (d) requires fewer components than all the other methods

8. Emitter bias is

  • (a) essentially independent of βdc
  • (b) very dependent on
  • (c) provides a stable bias point
  • (d) answers (a) and (c)

9. In an emitter bias circuit, the emitter current

  • (a) is 5.3 mA
  • (b) is 2.7 mA
  • (c) is 180 mA
  • (d) cannot be determined

10. The disadvantage of base bias is that

  • (a) it is very complex
  • (b) it produces low gain
  • (c) it is too beta dependent
  • (d) it produces high leakage current

11. Collector-feedback bias is

  • (a) based on the principle of positive feedback
  • (b) based on beta multiplication
  • (c) based on the principle of negative feedback
  • (d) not very stable

12. In a voltage-divider biased npn transistor, if the upper voltage-divider resistor (the one connected to VCC) opens,

  • (a) the transistor goes into cutoff
  • (b) the transistor goes into saturation
  • (c) the transistor burns out
  • (d) the supply voltage is too high

13. In a voltage-divider biased npn transistor, if the lower voltage-divider resistor (the one connected to ground) opens,

  • (a) the transistor is not affected
  • (b) the transistor may be driven into cutoff
  • (c) the transistor may be driven into saturation
  • (d) the collector current will decrease

14. In a voltage-divider biased pnp transistor, there is no base current, but the base voltage is approximately correct. The most likely problem(s) is

  • (a) a bias resistor is open
  • (b) the collector resistor is open
  • (c) the base-emitter junction is open
  • (d) the emitter resistor is open
  • (e) answers (a) and (c)
  • (f) answers (c) and (d)

15. If R1 in Figure 5–25 is open, the base voltage is

  • (a) +10 V
  • (b) 0 V
  • (c) 3.13 V
  • (d) 0.7 V

16. If R1 is open, the collector current in Figure 5–26 is

  • (a) 5.17 mA
  • (b) 10 mA
  • (c) 4.83 mA
  • (d) 0 mA

Complete List of Floyd Self-test in Electronic Devices

Check your work.

Floyd Self-test in Transistor Bias Circuits
Rate this:

Add Comment

© 2017 PinoyBIX Engineering. © 2017 All Rights Reserved | Donate
Basic Television - Grob TV  Chapter Exercises
Basic Television – Grob TV Chapter Exercises
Series of Multiple Choice Questions in Engineering Mathematics
Series of Multiple Choice Questions in Engineering Mathematics
Complete Practice Quiz in Electronic Devices and Circuit Theory
Complete Practice Quiz in Electronic Devices and Circuit Theory
Complete Practice Quiz in Data Communications and Networking
Complete Practice Quiz in Data Communications and Networking
Online Tool: Color Code Conversions
Online Tool: Color Code Conversions
Online Tool: Weight Measurement Conversions
Online Tool: Weight Measurement Conversions
Online Tool: Temperature Measurement Conversions
Online Tool: Temperature Measurement Conversions
Online Tool: Length Measurement Conversions
Online Tool: Length Measurement Conversions

Get FREE Review Course
in your inbox

Subscribe to our mailing list and get reviewers and updates to your email inbox.

Thank you for subscribing.

Something went wrong.