Analog Electronics MCQ Questions & Answers

Section 1 Section 2 Section 3 Section 4

1.
In the following limiter circuit, an input voltage V_i = 10 sin 100 πt is applied. Assume that the diode drop is 0.7 V when it is forward biased. The zener breakdown voltage is 6.8 V

The maximum and minimum values of the output voltage respectively are

A. 6.1 V, -0.7 V

B. 0.7 V, -7.5 V

C. 7.5 V, -0.7 V

D. 7.5 V, -7.5 V

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2.
Which power amplifier conducts from 0° to 180°

A. Class-A

B. Class-B

C. Class-AB

D. Class-C

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3.
For the Schmitt trigger circuit shown in figure, assuming diodes and op-amp are ideal, the value of lower and upper threshold points of voltage transfer characteristics, respectively, are

A. -8 V, +5 V

B. -5 V, +5 V

C. -5 V, +8 V

D. -8 V, +8 V

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4.
A small signal voltage amplifier in common emitter configuration was working satisfactorily. Suddenly its emitter bypass capacitor (C_E) got disconnected. Its:
1. Voltage gain will decrease
2. Voltage gain will increase
3. Bandwidth will decrease
4. Bandwidth will increase
Which of these statements are correct?

A. 1 and 4 only

B. 2 and 3 only

C. 3 and 4 only

D. 1, 2, 3 and 4

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5.
A Schmitt trigger circuit achieves hysteresis by utilizing

A. The magnetic properties of transformer core

B. Avalanche multiplication in a Zener diode

C. The Barkhausen principle

D. Regenerative positive feedback

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6.
Match the following.

List-I List-II

a. Hartley 1. Low frequency oscillator

b. Wien-bridge 2. High frequency oscillator

c. Crystal 3. Stable frequency oscillator

A. a-2, b-1, c-3

B. a-1, b-2, c-3

C. a-2, b-3, c-1

D. a-3, b-1, c-2

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7.
Current stability of a CC amplifier can be increased by

A. Reducing both emitter and base resistance

B. Increasing both emitter and base resistance

C. Reducing emitter resistance and increasing base resistance

D. Increasing emitter resistance and decreasing base resistance

E. Keeping emitter resistance and base resistance to same value

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8.
Three identical amplifiers with each one having a voltage gain of 50, input resistance of 1 kΩ and output resistance of 250 Ω, are cascaded. The open circuit voltage gain of the combined amplifier is

A. 49 dB

B. 51 dB

C. 98 dB

D. 102 dB

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9.
In a particular biasing circuit, the value of R_E is about . . . . . . . .

A. 10 kΩ

B. 1 MΩ

C. 100 kΩ

D. 800 Ω

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10.
In the circuit shown below, the switch was connected to position 1 at t < 0 and at t = 0, it is changed to position 2. Assume that the diode has zero voltage drop and a storage time t_s. For 0 < t ≤ t_s.V_Rs given by (all in Volts)

A. V_R = -5

B. V_R = +5

C. 0 ≤ V_R < 5

D. -5 < V_R < 0

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1 2 3 4 5 6 7 8

List-I	List-II
a. Hartley	1. Low frequency oscillator
b. Wien-bridge	2. High frequency oscillator
c. Crystal	3. Stable frequency oscillator

Analog Electronics MCQ Questions & Answers | ECE

1. In the following limiter circuit, an input voltage Vi = 10 sin 100 πt is applied. Assume that the diode drop is 0.7 V when it is forward biased. The zener breakdown voltage is 6.8 V The maximum and minimum values of the output voltage respectively are

Answer & Solution

2. Which power amplifier conducts from 0° to 180°

Answer & Solution

3. For the Schmitt trigger circuit shown in figure, assuming diodes and op-amp are ideal, the value of lower and upper threshold points of voltage transfer characteristics, respectively, are

Answer & Solution

Answer & Solution

5. A Schmitt trigger circuit achieves hysteresis by utilizing

Answer & Solution

6. Match the following. List-I List-II a. Hartley 1. Low frequency oscillator b. Wien-bridge 2. High frequency oscillator c. Crystal 3. Stable frequency oscillator

Answer & Solution

7. Current stability of a CC amplifier can be increased by

Answer & Solution

8. Three identical amplifiers with each one having a voltage gain of 50, input resistance of 1 kΩ and output resistance of 250 Ω, are cascaded. The open circuit voltage gain of the combined amplifier is

Answer & Solution

9. In a particular biasing circuit, the value of RE is about . . . . . . . .

Answer & Solution

10. In the circuit shown below, the switch was connected to position 1 at t < 0 and at t = 0, it is changed to position 2. Assume that the diode has zero voltage drop and a storage time ts. For 0 < t ≤ ts.VRs given by (all in Volts)

Answer & Solution

Read More Section(Analog Electronics)

1.
In the following limiter circuit, an input voltage V_i = 10 sin 100 πt is applied. Assume that the diode drop is 0.7 V when it is forward biased. The zener breakdown voltage is 6.8 V

The maximum and minimum values of the output voltage respectively are

2.
Which power amplifier conducts from 0° to 180°

3.
For the Schmitt trigger circuit shown in figure, assuming diodes and op-amp are ideal, the value of lower and upper threshold points of voltage transfer characteristics, respectively, are

5.
A Schmitt trigger circuit achieves hysteresis by utilizing

6.
Match the following.

List-I List-II

a. Hartley 1. Low frequency oscillator

b. Wien-bridge 2. High frequency oscillator

c. Crystal 3. Stable frequency oscillator

7.
Current stability of a CC amplifier can be increased by

8.
Three identical amplifiers with each one having a voltage gain of 50, input resistance of 1 kΩ and output resistance of 250 Ω, are cascaded. The open circuit voltage gain of the combined amplifier is

9.
In a particular biasing circuit, the value of R_E is about . . . . . . . .

10.
In the circuit shown below, the switch was connected to position 1 at t < 0 and at t = 0, it is changed to position 2. Assume that the diode has zero voltage drop and a storage time t_s. For 0 < t ≤ t_s.V_Rs given by (all in Volts)