Analog Electronics MCQ Questions & Answers

11

As compared to a full wave rectifier using 2 diodes, the four diode bridge rectifier has the dominant advantage of

A) Higher current carrying B) Lower peak inverse requirement C) Lower ripple factor D) Higher efficiency

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Answer & Solution

Answer: Option B

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12

For a full-wave rectifier with shunt capacitor filter, the peak to peak ripple voltage is
(where f = fundamental power line frequency, I_DC = DC current)

A) $$\frac{{2{{\text{I}}_{{\text{DC}}}}}}{{{\text{f C}}}}$$ B) $$\frac{{{{\text{I}}_{{\text{DC}}}}}}{{{\text{f C}}}}$$ C) $$\frac{{{{\text{I}}_{{\text{DC}}}}}}{{{\text{2f C}}}}$$ D) $$\frac{{{{\text{I}}_{{\text{DC}}}}}}{{{\text{4f C}}}}$$

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Answer & Solution

Answer: Option C

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13

In a multi-stage RC-coupled amplifier the coupling capacitor.

A) Limits the low frequency response B) Limits the high frequency response C) Does not effect the frequency response D) Blocks the d.c. components without effecting the frequency response

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Answer & Solution

Answer: Option A

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14

An amplifier has a D.C. power supply of 15 V and draws a current of 10 mA. It produces an output of 5 V peak across a load resistance of 600 Ω for a signal frequency of 1 kHz. What will be its A.C. power output?

A) 260 mW B) 20.8 mW C) 520 mW D) 40.6 mW

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Answer & Solution

Answer: Option B

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15

Determine the change in collector current, ∆I_C due to change in base emitter voltage V_BE from 25°C to 100°C for a Silicon Transistor in Fixed Bias Configuration having β = 100.
(Consider following variation in Silicon transistor parameters with temperature-At T = 25°C, V_BE = 0.65 V and At T = 100°C. V_BE = 0.5 V)

A) 60 µA B) 30 µA C) 15 µA D) 120 µA

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Answer & Solution

Answer: Option A

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16

While using a bipolar junction transistor as an amplifier, the collector and emitter terminals got interchanged mistakenly. Assuming that the amplifier is a common emitter amplifier and the biasing is suitably adjusted, the interchange of terminals will results into which one of the following?

A) Infinite gain B) Zero gain C) No change in gain at all D) Reduced gain

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Answer & Solution

Answer: Option D

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17

BJT is three terminal device which stands for bipolar junction transistor. Which of the following are true about BJT.
1. Base has smallest area to reduce the transit time.
2. collector is provided with the largest area to withstand heat dissipation.
3. BJT is a current controlled device.
4. BJT is a voltage controlled device.

A) 1, 2 and 3 B) 1, 2 and 4 C) only 1 and 2 D) only 2 and 4

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Answer & Solution

Answer: Option A

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18

If the op-amp in the figure has an input offset voltage of 5 mV and an open-loop voltage gain of 10,000, then V₀ will be
Analog Electronics mcq question image

A) 0 V B) 5 mV C) +15 V or -15 V D) +50 V or -50 V

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Answer & Solution

Answer: Option C

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19

The feedback topology in the amplifier circuit (the base bias circuit is not shown for simplicity) in the figure is
Analog Electronics mcq question image

A) Voltage shunt feedback B) Current series feedback C) Current shunt feedback D) Voltage series feedback

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Answer & Solution

Answer: Option B

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20

What is the load current I_L in the circuit below?
Analog Electronics mcq question image

A) -5 mA B) -10 mA C) +25 mA D) +50 mA

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Answer & Solution

Answer: Option B

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Analog Electronics MCQ Questions & Answers | ECE