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Analog Electronics MCQ Questions & Answers | ECE

Learn Analog Electronics MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Analog Electronics MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-2 section-3

Each section contains 100 MCQs on Analog Electronics .
11
Consider the circuit shown below. Find the output voltage V0 for input voltage Vi = 5 V. Assume the voltage drop across a conducting diode is 0.7 V.
Analog Electronics mcq question image
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Answer: Option C
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12
The circuit in the figure employs positive feedback and is intended to generate sinusoidal oscillation.
If at a frequency $${{\text{f}}_0},{\text{B}}\left( {\text{f}} \right) = \frac{{{{\text{V}}_{\text{f}}}\left( {\text{f}} \right)}}{{{{\text{V}}_0}\left( {\text{f}} \right)}} = \frac{1}{6}\angle {0^ \circ }$$     then to sustain oscillation at this frequency
Analog Electronics mcq question image
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Answer: Option A
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13
A bleeder resistor is used in a D.C power supply because it
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Answer: Option D
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14
In the following astable multivibrator circuit, which properties of V0 (t) depend on R2?
Analog Electronics mcq question image
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Answer: Option A
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15
In a half-wave rectifier, if an a.c. supply is 60 Hz, then what is the a.c. ripple at output?
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Answer: Option B
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16
Consider an ideal long channel nMOSFET (enhancement-mode) with gate length 10 µm and width 100 µm. The product of electron mobility (µn) and oxide capacitance per unit are (Cox) is µnCox = 1 mA/V2. The threshold voltage of the transistor is 1 V. For a gate-to-source voltage VGS = [2 - sin(2t)] V and drain-to-source voltage VDS = 1 V (substrate connected to the source), the maximum value of the drain-to-source current is . . . . . . . .
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Answer: Option C
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17
An n-channel depletion MOSFET has following two points on its ID - VGS curve:
(i) VGS = 0 at ID = 12 mA and
(ii) VGS = -6 volts at Z0 = ∞
Which of the following Q-points will give the highest transconductance gain for small signals?
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Answer: Option D
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18
A full wave rectifier with a centre tapped transformer supplies dc current of 100 mA to a load resistance of 20Ω. The secondary resistance of transformer is 1Ω. Each diode has a forward resistance of 0.5Ω. What are rms values of signal voltage across each half of the secondary as well as dc power supplied to the load?
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Answer: Option A
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19
Two transistors have the same value of α but different gain bandwidth products. One of them is a germanium transistor and the other is a silicon transistor. Both the transistors have similar geometries and base width. The transistor with lower GB product.
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Answer: Option B
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20
A transistor RC coupled amplifier is designed for a voltage and band gain of 20. But a measurement at a particular frequency shows the gain to be only 14. What is the likely phase shift at this frequency?
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Answer: Option B
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