Electronics MCQs Question and Answer in Engineering Physics

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A sinusoidal input voltage V_in of frequency ω is fed to the circuit shown in the figure, where C₁ ≫ C₂. If V_m is the peak value of the input voltage, then output voltage (V_out) is
Electronics mcq question image

A) $$2{V_m}$$ B) $$2{V_o}\sin \omega t$$ C) $$\sqrt 2 {V_m}$$ D) $$\frac{{{V_m}}}{2}\sin \omega t$$

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The low-pass active filter shown in the figure has a cut-off frequency of 2 kHz and a pass band gain of 1.5. The values of the resistors are
Electronics mcq question image

A) R₁ = 10 k$$\Omega $$; R₂ = 1.3 $$\Omega $$ B) R₁ = 30 k$$\Omega $$; R₂ = 1.3 $$\Omega $$ C) R₁ = 10 k$$\Omega $$; R₂ = 1.7 $$\Omega $$ D) R₁ = 30 k$$\Omega $$; R₂ = 1.7 $$\Omega $$

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Answer & Solution

Answer: Option D

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The largest analog output voltage from a 6-bit Digital to Analog Converter (DAC) which produces 1.0 V output for a digital input of 010100, is

A) 1.6 V B) 2.9 V C) 3.15 V D) 5.0 V

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Answer & Solution

Answer: Option C

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Which one of the sets of values given below does not satisfy the Boolean relation R = PQ' (where, Q' denotes not Q)?

A) P = 1, Q = 1, R = 0 B) P = 1, Q = 1, R = 1 C) P = 0, Q = 0, R = 0 D) P = 0, Q = 1, R = 1

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Answer & Solution

Answer: Option B

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In an n-p-n transistor, the leakage current consists of

A) electrons moving from the base to the emitter B) electrons moving from the collector to the base C) electrons moving from the collector to the emitter D) electrons moving from the base to the collector

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Answer & Solution

Answer: Option C

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A bipolar junction transistor with one junction forward biased and either the collector or emitter open, operates in the

A) cut-off region B) saturation region C) pinch-off region D) active region

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Answer & Solution

Answer: Option C

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The circuit shown in the figure can be used as a
Electronics mcq question image

A) high-pass filter or a differentiator B) low-pass filter or a differentiator C) high-pass filter or an integrator D) low-pass filter or an integrator

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Answer & Solution

Answer: Option D

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A field effect transistor is a

A) unipolar device B) special type of bipolar junction transistor C) unijunction device D) device with low input impedance

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Answer & Solution

Answer: Option A

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In a typical n-p-n transistor, the doping concentrations in emitter, base and collector regions are C_E, C_B and C_C respectively. These satisfy the relation,