# Practice Quiz in Power Amplifiers Part 5

Online Practice Quiz in Power Amplifiers part 5 from the book Electronic Devices and Circuit Theory 10th Edition by Robert L. Boylestad.

This is the Online Practice Quiz in Power Amplifiers Part 5 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 V of the Online Practice Quiz

#### Quiz in Power Amplifiers

Question 41. The beta of a power transistor is generally _____.

A. more than 200

B. 100 to 200

C. less than 100

D. 0

Question 42. A _____ power amplifier is limited to use at one fixed frequency.

A. class A

B. class B or AB

C. class C

D. class D

Question 43. The _____ has the hottest temperature in a power transistor.

A. heat sink

B. case

C. junction

D. None of these

Question 44. The slope of the ac load line in the class A transformer-coupled transistor is _____.

B. 1/(a2RL)

C. –1/(a2RL)

D. 1/RL

Question 45. Power amplifiers primarily provide sufficient power to an output load, typically from _____ to _____.

A. a few kW, tens of kW

B. 500 W, 1 kW

C. 100 W, 500 W

D. a few W, tens of W

Question 46. The fundamental component is typically _____ any harmonic component.

A. larger than

B. the same as

C. smaller than

D. None of these

Question 47. A class A amplifier dissipates _____ power when the load is drawing maximum power from the circuit.

A. the least

C. the most

D. None of these

Question 48. In class B power amplifiers, the output signal varies for _____ of the cycle.

A. 360Âº

B. 180Âº

C. between 180Âº and 360Âº

D. less than 180Âº

Question 49. Class D operation can achieve power efficiency of over _____.

A. 90%

B. 78.5%

C. 50%

D. 25%

Question 50. The reflected impedance seen from one side of the transformer to the other side is _____.

A. N1/N2

B. (N1/N2)2

C. (N1/N2)1/3

D. N1× N2

### 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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