Electronics And Instrumentation(Electrical Engineering ) Questions and Answers
Question 1. Which of the following is a digital transducer?
Strain gauge
Encoder
Thermistor
LVDT
Explanation:-
Answer: Option B. -> Encoder
Question 2. 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 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. 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 5. 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 6. The _________ of a recording system is the magnitude of input voltage required to produce a standard deflection in a recorded trace.
Accuracy
Linearity
Sensitivity
Resolution
Explanation:-
Answer: Option C. -> Sensitivity
Question 7. Pre amplifier isolation in ECG circuit is to
Increase input impedance
Decrease input impedance
Increase output impedance
Decrease output impedance
Explanation:-
Answer: Option A. -> Increase input impedance
Question 8. LVDT windings are wound on
Steel sheets
Aluminium
Ferrite
Copper
Explanation:-
Answer: Option C. -> Ferrite
Question 9. When a number of components are fabricated on same IC chip it is necessary to provide isolation between two different components for input interconnection is called __________.
Input amplification
Input differentiation
Common mode rejection
Input isolation
Explanation:-
Answer: Option D. -> Input isolation
Question 10. The input resistance of a VTVM is about ___________.
