Electronics And Instrumentation(Engineering > Electrical Engineering ) Questions and Answers
Question 1. The shorter wave length of the electron permits the detailed examination of tiny objects due to reduction of __________ effects
Reflection
Diffraction
Refraction
Polarization
Explanation:-
Answer: Option B. -> Diffraction
Question 2. Pick the correct statement regarding functions of a transducerS1: Sense the magnitude, change in & / or frequency of same measurandS2: To provide electrical output that furnishes accurate, quantitative data about the measurand
S1 is true & S2 is false
S2 is true & S1 is false
Both S1 & S2 are true
Both S1 & S2 are false
Explanation:-
Answer: Option C. -> Both S1 & S2 are true
Question 3. S1: In multimode fiber optics, intensity modulating schemes can be employed.S2: Schemes using polarizing techniques need birefringent fiber.
S1 is true and S2 is false
Both S1 and S2 are true
S1 is false and S2 is true
Both S1 and S2 are false
Explanation:-
Answer: Option B. -> Both S1 and S2 are true
Question 4. Which of the following is a digital transducer?
Strain gauge
Encoder
Thermistor
LVDT
Explanation:-
Answer: Option B. -> Encoder
Question 5. Common mode rejection ratio is defined as ratio of
Common mode gain to differential mode gain
Differential mode gain to common mode gain
Common mode gain at input to differential mode gain at input
Common mode gain at output to differential mode gain at output
Explanation:-
Answer: Option B. -> Differential mode gain to common mode gain
Question 6. ___________ amplifier is used to drive the recorder.
Power amplifier
Pre amplifier
Operational amplifier
Differential amplifier
Explanation:-
Answer: Option A. -> Power amplifier
Question 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
Active transducer
Primary sensor
Passive transducer
Self generating transducer
Explanation:-
Answer: Option C. -> Passive transducer
Question 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?
10 kΩ
20 kΩ
200 kΩ
None of the above
Explanation:-
Answer: Option C. -> 200 kΩ
Question 9. Which of the following recorder gives slow response