Incorrect statements regarding measurement are given : A. Hot wire anemometer is used to measure displacement B. Hall effect is used to measure current C. LVDT is used to measure acceleration and gas flow D. Piezoelectric Transducer is used to measure acceleration Choose the correct answer from the options given below:
A, B and C only
Let's analyze each statement regarding measurement to determine their correctness:
- Statement A: "Hot wire anemometer is used to measure displacement"
This statement is incorrect. A hot wire anemometer is primarily used to measure fluid velocity. It works by correlating the heat loss from a heated wire to the velocity of the fluid flowing past it, not displacement. - Statement B: "Hall effect is used to measure current"
The Hall effect is used in magnetic field sensors to measure magnetic field strengths or flux density, which can indirectly be used to measure current when it generates a magnetic field. However, it is not primarily used for measuring current directly, making this statement partially true but misleading in the context of primary applications. - Statement C: "LVDT is used to measure acceleration and gas flow"
This statement is incorrect. An LVDT (Linear Variable Differential Transformer) measures linear displacement or position, not acceleration or gas flow. It is widely used in applications requiring precise measurements of linear movements. - Statement D: "Piezoelectric Transducer is used to measure acceleration"
This is a correct statement. Piezoelectric transducers are commonly utilized to measure dynamic parameters such as vibrations and acceleration. They generate an electrical charge in response to applied mechanical stress, which is indicative of motion or acceleration.
Based on the analysis above, the incorrect statements are A, B, and C. Thus, the correct option is A, B and C only.
Similar Questions
Which of the following statements are correct ?
A. Hygrometer measures the value of humidity directly
B. Hygrometer measures the value of humidity indirectly
C. Wien's bridge is used to measure the frequency of the signal
D. Wien's bridge is used to measure the amplitude of the signal
E. Bimetallic strip is a thermal expansion detector.
Choose the most appropriate answer from the options given below :
Which of the following statements are correct
A. Megnetostrictive transducer operation depends on the change of permeability of magnetic material is when strained.
B. Potentiometer is an active transducer.
C. Turbine flow meters are volumetric flow meters
D. Any metal can be thermistor.
E. Thermocouples are used in high accuracy measurements.
Choose the most appropriate answer from the options given below :
Match List I with List II
LIST I LIST II A. Stroboscope I. Changes its electrical resistance with temperature B. Bolometer II. Generate thermoelectric emf C. Thermocouple III. Changes pressure to displacement D. Diaphragm IV. For measurement of rotary motion Choose the correct answer from the options given below:
Match the following lists :
List – I List – II a. Electromechanical Device i. Seismic Device b. Optical Device ii. Piezo-electric c. Gyroscopic device iii. Interferometers d. Absolute motion device iv. Aerospace vehicle Choose the correct answer from the codes given below:
Consider the following transducers or transducer systems :
(a) Float elements
(b) Seismic system
(c) Gyroscope
Arrange the above transducers/systems in decreasing order of the availability of possible number of output signals.
Consider the following statements associated with electrical and electronic transducers
A. Little power is consumed by transducer
B. Mass intertia effects are not minimized
C. The response time is small
D. Transmission and processing the signal for the purpose of measurement are easier.
Choose the correct answer from the options given below:
Match List I with List II
LIST I LIST II A. Relative error I. The ability of tde device to give identical O/P when repeated measurements are made witd tde same I/P signal B. Precision II. The ratio of difference between measured value and tde true value to tde true value of tde measurand C. Caliberation III. The smallest increment in measure tdat can be detected witd certainity by tde instrument D. Resolution IV. The process of making adjustments or tde scale so tdat tde instrument reading conform to an accepted standard. Choose the correct answer from the options given below:
The fundamental law that is used in temperature measurement is known as
Assertion (A) : Normally, some standard signal conditioner and display devices are used with a transducer, unless they are custom-built to suit the requirements of the transducers.
Reason (R) : A transducer is a device which receives energy in one form and transfer it to a convenient form.
Select your answer using the codes given below :
Which of the following transducers are not linear ?
i. thermistor
ii. thermocouple
iii. IC sensor
Important Questions from Basics of Transducers
Which of the following can act as an inverse transducer?
For transducers, following statements are given:
(A) An optical interferometer is useful for measuring extremely small motions
(B) The damping ratio of a seismic instrument should be low for good dynamic performance
(C) A rate gyro is a relative motion measuring device
(D) A pneumatic motion transducer is non-linear over a wide range of motion
(E) A piezoelectric accelerometer can only be used for static motion measurement
Choose the correct answer from the options given below:
Choose the INCORRECT statement with respect to the use of electrical transducers.
Consider the following transducers:
1. LVDT
2. Piezoelectric
3. Thermocouple
4. Photovoltaic cell
5. Strain gauge
Which of these are active transducers?
Under which condition, Transducers must operate?
