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ESE EE : Analog Electronics Champion Quiz 3

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Question 1

Statement (i): In tuned amplifier, a high gain is achieved at a narrow band of frequencies.
Statement (ii): A high-Q parallel resonant circuit is used as load in the amplifier.

Question 2

An amplifier without feedback has a gain of 1000. What is the gain negative feedback of 0.009?

Question 3

A negative feedback amplifier with open-loop gain

A0 > 0 and feedback factor β(> 0) will have a 3 dB cut-off at what frequency?

Question 4

Negative feedback in an amplifier leads to which one of the following?

Question 5

Statement (i): An RC phase shift oscillator satisfies Barkhausen criteria of oscillations.
Statement (ii): An RC phase shift oscillator must use 3 equal valued resistors and 3 equal valued capacitors.

Question 6

An amplifier has gain A=100 <1800, upper cut off frequency of 100 kHz and lower cut off frequency of 1 kHz. A negative feedback of β = 0.1 is added. Which one of the following is not correct?

Question 7

The amplifier circuit shown in the figure is an example of:

Question 8

In a negative feedback amplifier, when is the input impedance increased?

Question 9

Match List-I (Type of feedback) with List-II (Effect on Rin and Rout) and select the correct answer using the code given below the lists.
List-I
A) Voltage series
B) Voltage Shunt
C) Current Series
D) Current shunt
List-II
1) Rin increases and Rout decreases.
2) Rin and Rout decrease
3) Rin and Rout increase
4) Rin decreases and Rout increases.

Question 10

An amplifier has an open loop gain of 1000 ± 10. Negative feedback is provide such that the gain variation remains within 0.1%. What is the amount of feedback βF?
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Feb 5ESE & GATE EE