Field-Effect Transistors (FETs) - MCQs Answers

Below are the answers key for the Multiple Choice Questions (Quiz) in Field-Effect Transistors (FETs) .

1. between the ohmic area and the constant current area

2. pinch-off voltage

3. cutoff voltage

4. forward transconductance

5. the gate-source junction being reverse-biased

6. either a depletion or an enhancement MOSFET

7. MOSFET

8. 3 V

9. d

10. a

11. c

12. b

13. 6 V

14. 6.8 V

15. –9 V

16. 2 mA

17. 3.92 mA

18. 6 V

19. 8 V

20. 0 mA

21. –6 V

22. 2 V

23. reverse

24. ohmic, constant-current, breakdown

25. any of the above

26. D-MOSFET

27. true

28. I_DSS

29. 0

30. all of the above

31. V_GS

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Power Amplifiers - MCQs Answers

Below are the answers key for the Multiple Choice Questions (Quiz) in Power Amplifiers.

1. because the collector terminal is the critical terminal for heat dissipation

2. with no signal input

3. slightly less than 180° of the input cycle

4. thermal runaway

5. class C

6. class B

7. 750

8. class C

9. 4.4 mA

10. 5.4 V

11. class A

12. class AB

13. 0.7 V, 15 V, 0 V

14. about 78%

15. 10.7 V

16. 9.3 V

17. C₃ is open

18. BE₁ is open

19. R₁ is open

20. V_CC is 0 V

21. a sine wave.

22. 10

23. B

24. AB

25. 79

26. AB

27. C

28. all of the above

29. both of the above

30. B

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Bipolar Junction Transistor Amplifiers - MCQs Answers

Below are the answers key for the Multiple Choice Questions (Quiz) in Bipolar Junction Transistor Amplifiers .

1. effectively shorts

2. to maximize amplifier gain

3. to reduce the effects of r'_e

4. common-collector amplifier

5. emitter

6. the difference of the two input voltages

7. two inputs and two outputs

8. 3.125 Ω

9. 3.7 V

10. 6 mA

11. 5 V

12. 50 kΩ

13. 3.77 kΩ

14. 5

15. 416 Ω

16. 378 Ω

17. 600

18. 12 mV

19. an open C₂.

20. an open base-emitter of Q₁

21. a low voltage gain and a high input impedance

22. common-emitter

23. r_e′

24. high, high, high, low

25. replace coupling and bypass capacitors with opens

26. decreases

27. high, high, low

28. multiplication, increased

29. sum of dB voltage gains

30. h_re / h_oe

31. less input voltage is needed to turn it on.

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Transistor Bias Circuits - MCQs Answers

Below are the answers key for the Multiple Choice Questions (Quiz) in Transistor Bias Circuits .

1. collector-feedback bias

2. both positive and negative supply voltages

3. all of the above

4. all of the above

5. only if the base current is much larger than the current through R₂ (the lower bias resistor).

6. V_C = 8.75 V

7. halfway between cutoff and saturation.

8. 50 µA

9. 5 mA

10. 100

11. 5 mA

12. 2.5 V

13. 1.5 kΩ

14. 320 µA

15. R_E is open

16. no problems.

17. a short from collector to emitter

18. the base-emitter junction is open

19. voltage-divider bias

20. zero, I_(sat)

21. saturation, cutoff

22. voltage-divider

23. β_DCR_E

24. voltage-divider bias

25. base bias

26. emitter bias

27. collector-feedback bias

28. nonconducting

29. saturated

30. cutoff

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Bipolar Junction Transistors - MCQs Answers

Below are the answers key for the Multiple Choice Questions (Quiz) in Bipolar Junction Transistors .

1. all of the above

2. h_fe

3. saturation and cutoff

4. 0.7 V

5. varies with temperature and I_C.

6. bipolar junction transistor

7. 3.75 mA

8. 90

9. negative, positive

10. 7.5 V

11. 4.375 V

12. 0.7 V

13. 9.9 V

14. –9.2 V

15. 2.085 mA

16. 10.425 A

17. 13.21 V

18. 7.92 mA

19. 92 kΩ

20. cutoff

21. operating in saturation.

22. emitter, collector, base

23. npn and pnp

24. I_E = I_B + I_C

25. either β_DC or h_FE, but not α_DC

26. either β_DC / (β_DC + 1) or α_DC, but not β_DC

27. 0.7 < V_CE < V_CE(max)

28. both I_C and ºC

29. all of the above

30. all of the above

31. nA

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Special-Purpose Diodes - MCQs Answers

Below are the answers key for the Multiple Choice Questions (Quiz) in Special-Purpose Diodes .

1. electroluminescence.

2. reverse-breakdown region.

3. hot carrier diodes.

4. coherent and monochromatic light.

5. 8.325 V.

6. 161 mA.

7. remain the same, decrease

8. increase.

9. increase.

10. decrease.

11. e

12. b

13. d

14. c

15. a

16. the diode is open.

17. in very fast-switching circuits.

18. in circuits requiring negative resistance.

19. a varactor.

20. zener

21. avalanche

22. varactor

23. reverse, maximize

24. gallium.

25. current regulator

26. Schottky

27. Schottky

28. step-recovery

29. LED

30. to eliminate harmonic distortion

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Diode Applications - MCQs Answers

Below are the answers key for the Multiple Choice Questions (Quiz) in Floyd's Diode Applications .

1. 60 Hz

2. 100 Hz

3. reducing the peak output voltage by 0.7 V.

4. line regulation

5. load regulation

6. peak inverse voltage

7. the filter capacitor is shorted.

8. an open transformer secondary.

9. b

10. c

11. d

12. a full-wave rectifier (no filter) with an open diode.

13. c

14. b

15. d

16. a

17. c

18. a

19. forward-biased.

20. equal to

21. forward, 180º

22. twice

23. 2Vp_(out) + 0.7 V

24. increasing, increasing

25. clipper or limiter

26. clamper

27. 50 V

28. 3

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Introduction to Semiconductors - MCQs Answers

Below are the answers key for the Multiple Choice Questions (Quiz) in Introduction to Semiconductors .

1. All of the above

2. 2n² where n is the number of the shell.

3. has pentavalent impurity atoms added.

4. positive supply

5. anode

6. the value of dc voltages for the device to operate properly.

7. that impurities are added to decrease the resistance of the material.

8. 0.7 V.

9. a germanium diode.

10. cathode, anode

11. current.

12. 2.3 V, 1.6 V

13. reverse leakage current.

14. a pn junction.

15. is subjected to a large reverse voltage.

16. is relatively constant.

17. A material with few free electrons.

18. decreases.

19. the diode is internally shorted.

20. 4

21. 8

22. recombination

23. pentavalent

24. all of the above

25. forward-biased.

26. increased, increases

27. decreases

28. open, short

29. open

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