# Practice Quiz in Power Amplifiers Part 4

Online Practice Quiz in Power Amplifiers part 4 from the book Electronic Devices and Circuit Theory 10th Edition by Robert L. Boylestad.

This is the Online Practice Quiz in Power Amplifiers Part 4 from the book, Electronic Devices and Circuit Theory 10th Edition by Robert L. Boylestad. If you are looking for a reviewer in Electronics Engineering this will definitely help. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.

### Continue Part IV of the Online Practice Quiz

#### Quiz in Power Amplifiers

Question 31. What is the maximum temperature rating for silicon power transistors?

A. 50Âº to 80Âº

B. 100Âº to 110Âº

C. 150Âº to 200Âº

D. 250Âº to 300Âº

Question 32. The main features of a large-signal amplifier is the circuit's ______.

A. power efficiency

B. maximum power limitations

C. impedance matching to the output device

D. All of these

Question 33. What transformer turns ratio is required to match an 8-â„¦ speaker load so that the effective load resistance seen at the primary is 12.8 kâ„¦?

A. 20:1

B. 40:1

C. 50:1

D. 60:1

Question 34. Which of the power amplifiers is not intended primarily for large-signal or power amplification?

A. Class A

B. Class B or AB

C. Class C

D. Class D

Question 35. Which of the following describe(s) a power amplifier?

A. It can handle large power.

B. It can handle large current.

C. It does not provide much voltage gain.

D. All of these

Question 36. The main feature(s) of a large-signal amplifier is (are) the _____.

A. circuit's power efficiency

B. maximum amount of power that the circuit is capable of handling

C. impedance matching to the output

D. All of these

Question 37. The highest efficiency is obtained in class B operation when the level of VL(p) is equal to _____.

A. 0.25VCC

B. 0.50VCC

C. VCC

D. 2VCC

Question 38. A form of class A amplifier having maximum efficiency of _____ uses a transformer to couple the output signal to the load.

A. 90%

B. 78.5%

C. 50%

D. 25%

Question 39. The complementary Darlington-connected transistor for a class B amplifier provides _____ output current and _____ output resistance.

A. higher, higher

B. higher, lower

C. lower, lower

D. lower, higher

Question 40. A heat sink provides _____ thermal resistance between case and air.

A. a high

B. a low

C. the same

D. None of these

### More Practice Quiz in Power Amplifiers

Practice Quiz Part 1

Practice Quiz Part 2

Practice Quiz Part 3

Practice Quiz Part 4

Practice Quiz Part 5

Practice Quiz Part 6

### See: Complete List of Practice Quizzes

Note: After taking this particular quiz, you can proceed to check all the topics.

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