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

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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?

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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

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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?

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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

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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

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In the IC 7805, what is the minimum input voltage for proper functioning?

Options

A : 5V

B : 6V

C : 7V

D : 8V

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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

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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

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What is the output of the IC 7924?

Options

A : 12V

B : -12V

C : 24V

D : -24V

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