Analog Electronics Mcqs

This set of Electrical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “ Analog Electronics ”. These questions are chosen from a collection of most authoritative and best reference books on Electrical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Analog Electronics comprehensively.

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1.
Which of the following is not associated with a p-n junction?

Junction capacitance

Charge storage capacitance

Depletion capacitance

Channel length modulation

2.
Thermal runaway is not possible in FET because as the temperature of FET increases_________________?

The mobility decreases

The transconductance increases

The drain current increases

None of the above

3.
A change in the value of the emitter resistance Re in a differential amplifier?

Affects the difference mode gain Ad

Affects the common mode gain Ac

Ffects both Ad and Ac

Does not effect either Ad and Ac

4.
In a p-n junction diode under reverse bias , the magnitude of electric field is maximum at_____________?

The edge of the depletion region on the p-side

The edge of the depletion region on the n-side

The p-n junction

The center of the depletion region on the n-side

5.
A constant current signal across a parallel RLC circuits gives an o/p of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ .At the frequency of 4KHZ,the o/p voltage will be___________?

1 v

2v

1.4v

2.8v

6.
The bandwidth of an RF tuned amplifier is dependent on____________?

Q –factor of the tuned o/p circuit

Q –factor of the tuned i/p circuit

Quiescent operating point

Q-factor of the o/p and i/p circuits as well as quiescent operating point

7.
Most of the linear ICs are based on the two-transistor differential amplifier because of its___________?

Input voltage dependent linear transfer characteristic

High voltage gain

High input resistance

High CMRR

8.
A dc power supply has no-load voltage of 30v,and a full-load voltage of 25v at full-load current of 1A.Its output resistance & load regulation ,respectively are_____________?

5 Ω & 20 %

25 Ω & 20 %

5 Ω & 16.7 %

25 Ω & 16.7 %

9.
A 741-type OP-AMP has a gain-bandwidth product of 1MHz. A non-inverting amplifier using this op-amp & having a voltage gain of 20db will exhibit -3db bandwidth of__________?

50 KHz

100KHz

1000/17 KHz

1000/7.07 KHz

10.
In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db &2db respectively, then its common mode rejection ratio is__________?

23dB

25dB

46dB

50dB

11.
An amplifier without feedback has a voltage gain of 50,input resistance os 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is___________?

1/11KΩ

1/5KΩ

5KΩ

11KΩ

12.
An ideal OP-AMP is an ideal___________?

Current controlled Current source

Current controlled voltage source

Voltage controlled voltage source

Voltage controlled current source

14.
To prevent a DC return between source and load, it is necessary to use___________?

Resistor between source and load

Inductor between source and load

Capacitor between source and load

Either A. or B.

15.
Voltage Series feedback also called series-shunt feedback) results in__________?

Increase in both input & output impedances

Decreases in both input & output impedances

Increase in input impedance & decreases in output impedance

Decrease in input impedance & increase in output impedance

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