Analog Electronics MCQ Questions & Answers

61

The Wien bridge oscillator is

A) a free running oscillator B) a square wave generator C) a stable sine wave generator D) also called cosine oscillator

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Answer & Solution

Answer: Option C

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62

In a CMOS CS amplifier, the active load is obtained by connecting a

A) p channel current mirror circuit B) n channel transistor C) p channel transistor D) BJT current mirror

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Answer & Solution

Answer: Option A

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63

Match List-I with List-II and select the correct answer using the options given below the lists:

List-I (Oscillator)	List-II (Characteristics Features)
a. Wien Bridge	1. RF oscillator two inductance and one capacitance on the reactance network.
b. Colpitts	2. LC oscillator for radio frequency : three capacitances and one inductance in the reactance network.
c. Hartley	3. RC oscillator for audio frequency applications.
d. Clapp	4. RF oscillator : two capacitances and one inductance as the reactance network.

A) a-2, b-1, c-4, d-3 B) a-2, b-4, c-1, d-3 C) a-3, b-4, c-1, d-2 D) a-3, b-1, c-4, d-2

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Answer: Option C

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64

Calculate the frequency of following circuit
Analog Electronics mcq question image

A) f = 1270 Hz B) f = 1905 Hz C) f = 635 Hz D) f = 325 Hz

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Answer: Option C

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65

In figure what is the base current if V_BE = 0.7 V?
Analog Electronics mcq question image

A) 10 µA B) 10 mA C) 4 mA D) 9.3 µA

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Answer: Option D

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66

What will be the period and frequency of oscillation for an astable multivibrator, given the following specifications?
R₁ = 1 kΩ R₂ = 5.6 kΩ C₁ = 0.01 µF C₂ = 0.03 µF

A) 12.5 ms, 80 Hz B) 1.25 µs, 800 kHz C) 1.25 ms, 800 Hz D) 0.125 ms, 8 kHz

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Answer: Option D

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67

The percentage regulation of Half-wave rectifier is

A) $$\frac{{{{\text{V}}_{{\text{no load}}}} - {{\text{V}}_{{\text{load}}}}}}{{{{\text{V}}_{{\text{no load}}}}}} \times 100\% $$ B) $$\frac{{{{\text{V}}_{{\text{load}}}} - {{\text{V}}_{{\text{no load}}}}}}{{{{\text{V}}_{{\text{load}}}}}} \times 100\% $$ C) $$\frac{{{{\text{V}}_{{\text{no load}}}} - {{\text{V}}_{{\text{load}}}}}}{{{{\text{V}}_{{\text{load}}}}}} \times 100\% $$ D) $$\frac{{{{\text{V}}_{{\text{load}}}} - {{\text{V}}_{{\text{no load}}}}}}{{{{\text{V}}_{{\text{no load}}}}}} \times 100\% $$

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Answer & Solution

Answer: Option C

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68

Which one of the following statements is correct?
The rise time of an amplifier is

A) Directly proportional to the upper 3-dB frequency B) Inversely proportional to the upper 3-dB frequency C) Directly proportional to the lower 3-dB frequency D) Inversely proportional to the lower 3-dB frequency

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Answer: Option B

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69

Assume the op-amp in the circuit of figure to be ideal. The value of the output voltage v₀ is
Analog Electronics mcq question image

A) 3.2 v_i B) 4 v_i C) 9 v_i D) 10 v_i

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Answer: Option B

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70

An amplifier circuit has an overall current gain of -100 and an input resistance of 10 kΩ with a load resistance of 1 kΩ. The overall voltage gain of the amplifier is

A) 5 dB B) 10 dB C) 20 dB D) 40 dB

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Answer: Option C

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Analog Electronics MCQ Questions & Answers | ECE