ESE (IES) Quiz on Analog Electronic Circuits

Question 1

Assertion (A): In a Darlington connection. Two transistors are connected in cascade in common emitter configuration.
Reason (R): The Darlington connection aims at making the current gain very high, almost equal to the product of bet of individual transistors.

  • ABoth A and R are true and R is the correct explanation of A
  • BBoth A and R are true but R is not the correct explanation of A
  • CA is true but R is false
  • DA is false but R is true

Question 2

When a voltage divider biased amplifier has its Q-point near to the middle of the dc-load line, what is the maximum umclippe peak-to-peak output voltage?

  • AVCEQ
  • BICQrL
  • C2 ICQrL
  • D2 VCEQ

Question 3

Consider the following statements:
A clamper circuit
1) adds or subtracts a dc voltage to or from a waveform.
2) does not change the shape of the waveform.
3) amplifies the waveform.
Which of the statements given above are correct?

  • A1 and 2
  • B2 and 3
  • C1 and 3
  • D1, 2 and 3

Question 4

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?

  • A1/10
  • B1/9
  • C9/100
  • D9/1000

Question 5

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

  • AIf the signal sampled is a voltage
  • BIf the signal sampled is a current
  • CIf the feedback signal is a voltage
  • DIf the feedback signal is a current.

Question 6

Consider the following statements related to a CMOS (Complementary metal oxide semiconductor) inverter.
1) It combines an n-channel and a p-channel MOS transistor.
2) For binary 1 input, both transistors are OFF.
3) For binary 0 input, both transistors are ON.
4) Whatever is the state of input, one transistor is ON while the other is OFF.
Which of the statements given above are correct?

  • A1, 2, 3 and 4
  • B1 and 4
  • C1, 2 and 3
  • D3 and 4

Question 7

The noise figure of a lossy network at room temperature equals the

  • AGain of the network
  • BAttenuation factor of the network
  • CEquivalent noise temperature of the network
  • DInput noise power

Question 8

Pulses of definite width can be obtained from irregular shaped pulses:

  • AWhen it is given as input to a monostable multivibrator
  • BWhen is given as triggering signal to a bistable multivibrator
  • CWhen it is used as input to a Schmitt trigger
  • DWhen it is used as input to a pulse transformer

Question 9

For the circuit given below, what is IL equal to

  • A
  • B
  • C
  • D

Question 10

Three amplifier each of gain (A0/2) and producing a phase of 60 ° are connected in tandem. The feedback loop is closed through a positive gain of 0.008. what should be the value of A0 for the system to be oscillatory?

  • A+10
  • B–10
  • C+250
  • D83.3
Categories: Exams

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