Electronics & Instrumentation MCQ Questions & Answers

1

The shorter wave length of the electron permits the detailed examination of tiny objects due to reduction of __________ effects

A) Reflection B) Diffraction C) Refraction D) Polarization

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Answer & Solution

Answer: Option B

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2

Pick the correct statement regarding functions of a transducer
S1: Sense the magnitude, change in & / or frequency of same measurand
S2: To provide electrical output that furnishes accurate, quantitative data about the measurand

A) S1 is true & S2 is false B) S2 is true & S1 is false C) Both S1 & S2 are true D) Both S1 & S2 are false

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Answer & Solution

Answer: Option C

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3

S1: In multimode fiber optics, intensity modulating schemes can be employed.
S2: Schemes using polarizing techniques need birefringent fiber.

A) S1 is true and S2 is false B) Both S1 and S2 are true C) S1 is false and S2 is true D) Both S1 and S2 are false

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Answer & Solution

Answer: Option B

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4

Common mode rejection ratio is defined as ratio of

A) Common mode gain to differential mode gain B) Differential mode gain to common mode gain C) Common mode gain at input to differential mode gain at input D) Common mode gain at output to differential mode gain at output

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Answer & Solution

Answer: Option B

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5

Which of the following is a digital transducer?

A) Strain gauge B) Encoder C) Thermistor D) LVDT

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Answer & Solution

Answer: Option B

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6

___________ amplifier is used to drive the recorder.

A) Power amplifier B) Pre amplifier C) Operational amplifier D) Differential amplifier

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Answer & Solution

Answer: Option A

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7

The transducers which requires an external power and their output is a measure of some variation such as resistance, inductance, capacitance etc., are called as

A) Active transducer B) Primary sensor C) Passive transducer D) Self generating transducer

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Answer & Solution

Answer: Option C

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8

What is the total resistance of a voltmeter on the 10 V range when the meter movement is rated for 50 µA of full-scale current?

A) 10 kΩ B) 20 kΩ C) 200 kΩ D) None of the above

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Answer & Solution

Answer: Option C

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9

Which of the following recorder gives slow response

A) X-Y recorder B) Oscillographic C) Galvanometric D) Magnetic

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Answer & Solution

Answer: Option C

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10

An ideal amplifier has

A) Noise figure of 0 db B) Noise figure of more than 0 db C) Noise factor of unity D) Noise figure of less than 1 db

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Answer & Solution

Answer: Option C

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Electronics & Instrumentation MCQ Questions & Answers | Electrical Engineering