Class D Amplifiers MCQ’s

Electronic Devices & Circuits Electronics & Communication Engineering

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Class D Amplifiers”.

1. For an ideal class D amplifier, what time is required in transitioning between states?
a) 0
b) 10
c) 100
d) Infinite

2. Which of the following is an example for the application of class D amplifier?
a) Switch
b) Torch
c) Pulse generator
d) Bulb

3. Why a class D amplifier is called as switching amplifier?
a) Because it consists of a transistor
b) Because of high power
c) Because of less noise effect
d) Because of binary switch

4. Which of the following is true about class D amplifier?
a) Its efficiency is very less
b) It can be made to work as bulb
c) It is big in size
d) It operates on lesser frequently

5. MOSFET class D amplifier is more advantageous than BJT class D amplifier.
a) True
b) False

6. Why the cost of MOSFET based power amplifier is less?
a) High impedance
b) Low capacitance
c) Low power dissipation
d) Lesser in size

7. Efficiency of class D amplifier____________
a) 100%
b) 59%
c) 75%
d) 60%

8. Which of the following is true about MOSFET class D amplifier?
a) It has infinite gain
b) It is less stable
c) It is less advantageous
d) It dissipates less heat

9. What is the conduction angle of class D amplifier?
a) 180
b) 270
c) 0
d) 90

10. Why filters are required in class D amplifier?
a) Output is completely dependent on the lower frequency spectrum
b) To increase the complexity
c) To obtain only lower frequency
d) To nullify noise

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