Voltage Regulators - 1 Online Exam Quiz
Voltage Regulators - 1 GK Quiz. Question and Answers related to Voltage Regulators - 1. MCQ (Multiple Choice Questions with answers about Voltage Regulators - 1
At the resonant frequency, what is the phase shift for the output in a Wien Bridge oscillator?
Options
A : 0?
B : 45?
C : 90?
D : 180?
Consider the circuit shown below.^^ Given that R1=20k?, C1=2nF, R2=20k?, C2=2nF, find the approximate resonant frequency.
Options
A : 4kHz
B : 3kHz
C : 25kHz
D : 15kHz
For any Wien Bridge oscillator, R1 = R2 and C1 = C2 always in the bridge, provided the phase shift through the amplifier is zero.
Options
A : TRUE
B : FALSE
C : -
D : -
In the below circuit, the output frequency is 0.5 Mhz.^^ C1 = 5nF, R4 = 40k?, R3 = 20k?. Find the value of R.
Options
A : 63?
B : 220?
C : 127?
D : 55?
In the figure below, the voltage V1 ranges from 15 to 35V. The load current is 20mA. The diode knee current is 2 mA, the breakdown voltage is 5V and power rating is 200 mW.^^ Calculate the range of R2 for the circuit to behave properly as a regulator.
Options
A : 400? =< R2 =< 500?
B : 450? =< R2 =< 500?
C : 454? =< R2 =< 500?
D : 454? =< R2 =< 600?
The following circuit is provided. R1=R2 and C1=C2.^^ What is the correct choice for sustained oscillation?
Options
A : R1 = R2
B : R4 = 2R3
C : R4 = 3R3
D : R1 = R2 = R3 = R4
The following circuit is provided.^^ Given that V1 varies from 20V to 50V, the diode breakdown voltage is 5V, the knee current is 1mA and the current is 9 mA across R1, find the maximum value of R2.
Options
A : 4500?
B : 1500?
C : 2000?
D : 5000?
Which of these is a disadvantage of the Wien Bridge oscillator?
Options
A : It cannot fabricate a pure tune
B : Distortion observed in output is high
C : It cannot be used for high resistance values
D : There is no automatic gain control
Which of these is a not drawback of Zener diode shunt regulator?
Options
A : The output voltage is fixed
B : The output voltage can vary with temperature
C : Variation in load current needs to be minimal
D : It is difficult to design
Which of these is incorrect for a Wien Bridge oscillator?
Options
A : Low distortion
B : Good stability at the resonant frequency
C : Difficult to tune
D : Based on frequency selective form of a Wheatstone bridge
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