Analog Electronics MCQ Questions & Answers

51

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

A) Increase in current gain B) Increase in voltage gain C) Decrease in voltage gain D) Decrease in bandwidth

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Answer & Solution

Answer: Option C

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52

The equivalent dc output voltage of a half wave rectifier is . . . . . . . . the equivalent dc output voltage of a full wave rectifier.

A) equal to B) half C) double D) not related to

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Answer & Solution

Answer: Option B

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53

For the circuit given in the figure, consider the following statements:
1. The output V_O will consist of a positive and a negative spike if RC << T.
2. The output V_O will be similar to V_i if RC >> T.
3. The output will have a higher rise time if RC is made progressively smaller than T.
Of these statements:
Analog Electronics mcq question image

A) 1, 2 and 3 are correct B) 1 and 2 are correct C) 2 and 3 are correct D) 1 and 3 are correct

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Answer & Solution

Answer: Option B

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54

Cascode amplifier when compared with a simple common-emitter amplifier provide which of the following?

A) Higher voltage gain and same bandwidth B) Same voltage gain but higher bandwidth C) No change in either voltage gain or bandwidth D) Voltage gain less than one but bandwidth equal to f_T

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Answer & Solution

Answer: Option B

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55

In the circuit shown in the given figure, the approximate voltage at the transistor
Analog Electronics mcq question image

A) base and emitter respectively are -8 V and -7.3 V B) base and collector respectively are -8 V and -5 V C) collector and emitter respectively are -8 V and -7.3 V D) base, emitter and collector respectively are -8 V, -7.3 and -5 V

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Answer & Solution

Answer: Option A

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56

Which is not considered as a linear voltage regulator?

A) Adjustable voltage regulator B) Series voltage regulator C) Shunt voltage regulator D) Switching regulator

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Answer & Solution

Answer: Option D

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57

A Schmitt trigger is a digital circuit that produce

A) Rectangular output when the input is sinusoidal B) Sinusoidal output when the input is rectangular C) Square output when the input is trapezoidal D) Rectangular output regardless of the input waveform

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Answer & Solution

Answer: Option D

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58

The transistor shunt regulator shown in the figure has a regulated output voltage of 10 V, when the input varies from 20 V to 30 V. The relevant parameters for the zener diode and the transistor are: V_Z = 9.5, V_BE = 0.5 V, β = 99. Neglect the current through R_B. Then the maximum power dissipated in the zener diode (P_Z) and the transistor (P_T) are
Analog Electronics mcq question image

A) P_Z = 75 mW, P_T = 7.9 W B) P_Z = 85 mW, P_T = 8.9 W C) P_Z = 95 mW, P_T = 9.9 W D) P_Z = 115 mW, P_T = 11.9 W

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Answer & Solution

Answer: Option C

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59

The following configuration is an example of positive feedback system:

A) Inverting amplifier B) Non-inverting amplifier C) Schmitt trigger D) None of these

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Answer & Solution

Answer: Option C

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60

Barkhausen criterion is related to

A) Filter B) Amplifier C) Oscillator D) None of these

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Answer & Solution

Answer: Option C

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Analog Electronics MCQ Questions & Answers | ECE