Push-Pull Class B Amplifier Online Exam Quiz
Push-Pull Class B Amplifier GK Quiz. Question and Answers related to Push-Pull Class B Amplifier. MCQ (Multiple Choice Questions with answers about Push-Pull Class B Amplifier
Consider the circuit shown and find the percentage increase in power dissipation of the transistor if the source voltage increases by 10%.^^ Given that the breakdown voltage is 5V, R1=10k?, R2=100k?, R3=200k?, R4=10?. The source voltage VS=25V.
Options
A : 10%
B : 20.22%
C : 14.28%
D : 15.66%
Consider the following circuit. Find the power dissipation of the transistor given that the diode breakdown voltage is 5V, R1=20k?, R2=100k?, R3=200k?, R4=10?. The source voltage VS=20V.^
Options
A : 12.12W
B : 9.375W
C : 9.27W
D : 10.575W
Consider the op-amp circuit shown.^^ The breakdown voltage of the Zener is 5V. ? for the transistor is 100. R1=10k?, R2=90k?, R3=30k?, R4=50k?. Calculate the total output voltage.
Options
A : 20V
B : 30V
C : 5V
D : 50V
In a power supply, the output voltage can vary due to multiple reasons. Which of these is not true if it is found that the output voltage is constant?
Options
A : The voltage stability factor is very high
B : The output resistance is zero
C : The temperature coefficient is zero
D : The voltage stability factor is very small
In the Zener controlled series regulator shown below, find the current through the Zener diode.^^ Given that the Zener diode breakdown voltage is 5V, the source voltage is 15V, the output voltage is 10V, R4 = 2k?, ?=99, R1=2k?.
Options
A : 5.05 mA
B : 4.95 mA
C : 3.33 mA
D : 0
Which of these is incorrect for complementary symmetry push-pull amplifiers?
Options
A : During positive cycle NPN transistor conducts
B : It is easier to fabricate on IC
C : Size of the transformer required reduces
D : Efficiency and figure of merit are same as transformer coupled push-pull amplifier
Why does no DC current flow in the primary winding of the output transformer of class B push-pull amplifier?
Options
A : Because DC currents from both transistors flow in opposite directions
B : Because the net impedance is very high to allow flow of current
C : The winding only allows AC current to flow
D : Current only flows in secondary winding due to the presence of load at that side
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