Analog Electronics MCQ Questions & Answers

1.
The action of JFET in its equivalent circuit can best be represented as a

A. Current controlled Current source

B. Current controlled voltage source

C. Voltage controlled voltage source

D. Voltage controlled current source

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2.
In a CB amplifier the maximum efficiency could be

A. 99%

B. 85%

C. 50%

D. 25%

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3.
In a p⁺n junction diode under reverse bias, the magnitude of electric field is maximum at

A. The edge of the depletion region on the p-side

B. The edge of the depletion region on the n-side

C. The p⁺n junction

D. The center of the depletion region on the n-side

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4.
To prevent a DC return between source and load, it is necessary to use

A. Resistor between source and load

B. Inductor between source and load

C. Capacitor between source and load

D. Either A or B

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5.
A constant current signal across a parallel RLC circuits gives an output of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ. At the frequency of 4KHZ, the output voltage will be

A. 1 v

B. 2 v

C. 1.4 v

D. 2.8 v

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6.
If $$\alpha $$ = 0.98, $${I_{{\text{CO}}}} = 6\mu {\text{A}}$$ and $${I_\beta } = 100\mu {\text{A}}$$ for a transistor, then the value of $${I_{\text{C}}}$$ will be

A. 2.3 mA

B. 3.2 mA

C. 4.6 mA

D. 5.2 mA

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7.
Which of the following is not associated with a p-n junction

A. Junction capacitance

B. Charge storage capacitance

C. Depletion capacitance

D. Channel length modulation

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8.
The cascade amplifier is a multistage configuration of

A. CC-CB

B. CE-CB

C. CB-CC

D. CE-CC

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9.
An npn BJT has g_m = 38 mA/v, C_µ = 10^-14 F, C_π = 4 × 10^-13 F and DC current gain β₀ = 90. For this transistor f_T & f_β are

A. f_T = 1.64 x 10⁸ Hz & f_β = 1.47 x 10¹⁰ Hz

B. f_T = 1.47 x 10¹⁰ Hz & f_β = 1.64 x 10⁸ Hz

C. f_T = 1.33 x 10¹² Hz & f_β = 1.47 x 10¹⁰ Hz

D. f_T = 1.47 x 10¹⁰ Hz & f_β = 1.33 x 10¹² Hz

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10.
Negative feedback in an amplifier

A. Reduces gain

B. Increase frequency &phase distortion

C. Reduces bandwidth

D. Increases noise

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Analog Electronics MCQ Questions & Answers | ECE

1. The action of JFET in its equivalent circuit can best be represented as a

Answer & Solution

2. In a CB amplifier the maximum efficiency could be

Answer & Solution

3. In a p+n junction diode under reverse bias, the magnitude of electric field is maximum at

Answer & Solution

4. To prevent a DC return between source and load, it is necessary to use

Answer & Solution

5. A constant current signal across a parallel RLC circuits gives an output of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ. At the frequency of 4KHZ, the output voltage will be

Answer & Solution

6. If $$\alpha $$ = 0.98, $${I_{{\text{CO}}}} = 6\mu {\text{A}}$$ and $${I_\beta } = 100\mu {\text{A}}$$ for a transistor, then the value of $${I_{\text{C}}}$$ will be

Answer & Solution

7. Which of the following is not associated with a p-n junction

Answer & Solution

8. The cascade amplifier is a multistage configuration of

Answer & Solution

9. An npn BJT has gm = 38 mA/v, Cµ = 10-14 F, Cπ = 4 × 10-13 F and DC current gain β0 = 90. For this transistor fT & fβ are

Answer & Solution

10. Negative feedback in an amplifier

Answer & Solution

1.
The action of JFET in its equivalent circuit can best be represented as a

2.
In a CB amplifier the maximum efficiency could be

3.
In a p⁺n junction diode under reverse bias, the magnitude of electric field is maximum at

4.
To prevent a DC return between source and load, it is necessary to use

5.
A constant current signal across a parallel RLC circuits gives an output of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ. At the frequency of 4KHZ, the output voltage will be

6.
If $$\alpha $$ = 0.98, $${I_{{\text{CO}}}} = 6\mu {\text{A}}$$ and $${I_\beta } = 100\mu {\text{A}}$$ for a transistor, then the value of $${I_{\text{C}}}$$ will be

7.
Which of the following is not associated with a p-n junction

8.
The cascade amplifier is a multistage configuration of

9.
An npn BJT has g_m = 38 mA/v, C_µ = 10^-14 F, C_π = 4 × 10^-13 F and DC current gain β₀ = 90. For this transistor f_T & f_β are

10.
Negative feedback in an amplifier