Voltage Regulators - 2 Online Exam Quiz
Voltage Regulators - 2 GK Quiz. Question and Answers related to Voltage Regulators - 2. MCQ (Multiple Choice Questions with answers about Voltage Regulators - 2
A first-order Butterworth low pass filter is an interconnection of __ and ___
Options
A : Single low pass RC circuit, Voltage follower
B : Low pass RC circuit, Band-pass RC circuit
C : Low pass RC circuit, LC feedback
D : Single low pass RC circuit, Power amplifier
Considering a second-order Butterworth LPF using an op-amp, where damping factor = 1.414 find the value of R3, given the following circuit. (R2=5k?)^
Options
A : 6.71 k?
B : 4.22 k?
C : 2.93 k?
D : 5 k?
Find the cutoff frequency for the following circuit. (R1=R2=20k?)^
Options
A : 25 kHz
B : 3987 rad/sec
C : 2500 Hz
D : 25000 rad/sec
For the following circuit, R2=220k?, R1=10k?, find the maximum gain and the phase shift at the cutoff frequency.^
Options
A : Maximum gain = 22, Phase shift = 45?
B : Maximum gain = 23, Phase shift = 135?
C : Maximum gain = 22, Phase shift = 225?
D : Maximum gain = 23, Phase shift = 45?
Given a second-order Butterworth HPF, find the maximum gain magnitude.
Options
A : 1.586 dB
B : 4 dB
C : 2.66 dB
D : 1 dB
In a transistorized series regulator, how is the overload and short-circuit protection provided?
Options
A : By the use of a thermistor
B : By using two additional diodes and a current sensing resistor to protect the series transistor
C : By using a diode and an additional resistor to protect the transistor
D : By using a diode along with a capacitor of a small capacitance value in series
In the IC 7805, what is the minimum input voltage for proper functioning?
Options
A : 5V
B : 6V
C : 7V
D : 8V
The following is a shunt regulator. Find maximum power dissipation of the Zener diode and transistor, given that the source voltage varies from 20-40V, the Zener breakdown voltage is 5V, the output voltage is 10V, the resistance R1=50?, R2=20k?, ?=99, VBE=0.5V.^
Options
A : PTransistor = 5.12 W, PZener = 0.051 W
B : PTransistor = 0.41 W, PZener = 0.57 W
C : PTransistor = 5.94 W, PZener = 0.057 W
D : PTransistor = 6.22 W, PZener = 5.66 W
What is not related to a transistorized series regulator?
Options
A : The output can be varied by using a variable resistor
B : The output is independent of temperature
C : The overload and short circuit protection is not required
D : The circuit has negative feedback responsible for regulation
What is the output of the IC 7924?
Options
A : 12V
B : -12V
C : 24V
D : -24V
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