Analog Electronics MCQ Questions & Answers

61

The cut-in voltage V_γ and thermal voltage V_T for the diode D in figure shown below are 0.498 V and 2 mV, respectively.
If the value of resistor R is 20 Ω, the current flowing through the diode is:
Analog Electronics mcq question image

A) 275 mA B) 250 mA C) 200 mA D) less than 200 mA

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Answer & Solution

Answer: Option B

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62

The current through the resistor R in the below
Analog Electronics mcq question image

A) 1 mA B) 4 mA C) 8 mA D) 10 mA

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Answer & Solution

Answer: Option D

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63

What will be the average value of V(t) in the circuit given below

A) $$ - \frac{{{{\text{V}}_{\text{m}}}}}{\pi }$$ B) $$ - \frac{{{{\text{V}}_{\text{m}}}}}{{2\pi }}$$ C) $$ - \frac{{{{\text{V}}_{\text{m}}}}}{{\sqrt 2 }}$$ D) $$0$$

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Answer: Option A

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64

Match List-I (Application of the circuit) with List-II (Circuit Name) and select the correct answer using the options given below the lists:

List-I (Application of the circuit)	List-II (Circuit Name)
a. Divider	1. Astable multivibrator
b. Clips input voltage at two predetermined Levels	2. Schmitt trigger
c. Square wave generator	3. Bistable multivibrator
d. Narrow current pulse generator	4. Blocking oscillator

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

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Answer: Option D

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65

Roll-off factor is defined as

A) The bandwidth occupied beyond the Nyquist Bandwidth of the filter B) The performance of the filter or device C) Aliasing effect D) None of the above

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Answer: Option A

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66

Match List-I (Models of BJT) with List-II (Applications) and select the correct answer using the options given below the lists:

List-I (Models of BJT)	List-II (Applications)
a. Hybrid model	1. Microwave measurements
b. Hybrid pi-model	2. Coupled diode
c. S-parameter	3. Low frequency
d. Ebers-Moll model	4. High frequency

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

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Answer: Option C

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67

Thermal runaway will take place if the quiescent point is such that

A) V_CE > $$\frac{1}{2}$$V_CC B) V_CE < V_CC C) V_CE < 2V_CC D) V_CE < $$\frac{1}{2}$$V_CC

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Answer: Option A

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68

The relation between β and α is . . . . . . . .

A) $$\beta = \frac{1}{{1 - \alpha }}$$ B) $$\beta = \frac{{1 - \alpha }}{\alpha }$$ C) $$\beta = \frac{\alpha }{{1 - \alpha }}$$ D) $$\beta = \frac{\alpha }{{1 + \alpha }}$$

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Answer: Option C

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69

A transistor has h_fe = 50, its h_fc will be

A) -50 B) +50 C) -51 D) +51

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Answer: Option C

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70

Which of the following statements is not true?

A) All oscillators satisfy the Barkhausen criterion B) An oscillator is an amplifier that supplies its own input signal C) An oscillator is a circuit that converts dc to ac D) In-phase feedback is called positive feedback

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Answer: Option A

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Analog Electronics MCQ Questions & Answers | ECE