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
  1.    Reflection
  2.    Diffraction
  3.    Refraction
  4.    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
  1.    S1 is true & S2 is false
  2.    S2 is true & S1 is false
  3.    Both S1 & S2 are true
  4.    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.
  1.    S1 is true and S2 is false
  2.    Both S1 and S2 are true
  3.    S1 is false and S2 is true
  4.    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?
  1.    Strain gauge
  2.    Encoder
  3.    Thermistor
  4.    LVDT
Explanation:-
Answer: Option B. -> Encoder
Question 5. Common mode rejection ratio is defined as ratio of
  1.    Common mode gain to differential mode gain
  2.    Differential mode gain to common mode gain
  3.    Common mode gain at input to differential mode gain at input
  4.    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.
  1.    Power amplifier
  2.    Pre amplifier
  3.    Operational amplifier
  4.    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
  1.    Active transducer
  2.    Primary sensor
  3.    Passive transducer
  4.    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?
  1.    10 kΩ
  2.    20 kΩ
  3.    200 kΩ
  4.    None of the above
Explanation:-
Answer: Option C. -> 200 kΩ
Question 9. Which of the following recorder gives slow response
  1.    X-Y recorder
  2.    Oscillographic
  3.    Galvanometric
  4.    Magnetic
Explanation:-
Answer: Option C. -> Galvanometric
Question 10. An ideal amplifier has
  1.    Noise figure of 0 db
  2.    Noise figure of more than 0 db
  3.    Noise factor of unity
  4.    Noise figure of less than 1 db
Explanation:-
Answer: Option C. -> Noise factor of unity
© Lakshya_Education.com, All Right Reserved.
Contact Us services