Instrumentation Amplifier MCQs : This section focuses on the "Instrumentation Amplifier". These Multiple Choice Questions (MCQs) should be practiced to improve the Instrumentation Amplifier skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
An instrumentation system does not include
A. Transducer
B. Instrumentation amplifier
C. Automatic process controller
D. Tester
Question 2
Consider a thermistor having the following specifications: RF=150kΩ at a reference temperature of 35oC and temperature coefficient of resistance = 25oC. Determine the change in resistance at 100oC.
A. -1.625MΩ
B. 9.75MΩ
C. 4.78MΩ
D. None of the mentioned
Question 3
Express the equation for transducer bridge, if all the resistor values are equal
A. v=-(△R×Vdc)/(2×R+△R)
B. v=-(△R×Vdc)/2×(R+△R)
C. v=-Vdc/[2×(2×R+△R)].
D. v=-(△R×Vdc)/ [2×(2×R+△R)].
Question 4
General purpose op-amps are used in applications as
A. Instrumentation amplifier
B. Differential instrumentation amplifier
C. Inverting instrumentation amplifier
D. Non-inverting instrumentation amplifier
Question 5
How a differential instrumentation amplifier using transducer bridge can be used as a temperature controller?
A. Increase room temperature
B. Replaces calibrated meter with relay
C. Change the bridge resistance
D. Replace thermistor by light intensity meter
Question 6
In an instrumentation amplifier using transducer bridge, which device measure the change in physical energy
A. Resistive transducer
B. Indicating meter
C. Capacitive transducer
D. Inductor circuit
Question 7
Name the resistive transducer that varies its resistance on application of external stress?
A. Photocells
B. Light dependent
C. Stain gage
D. None of the mentioned
Question 8
Photo conductive cell changes it resistance with
A. Change in temperature
B. Material composition
C. Incident radiant energy
D. Change in elasticity
Question 9
Strain gage are used to monitor change in
A. Pressure
B. Torque
C. Displacement
D. All of the mentioned
Question 10
Strain gage is an example of which device?
A. Transducer
B. Voltage follower
C. Integrator
D. Differentiator
Question 11
The strain gage elements in the analog weight scale are mounted on a
A. Base of weight platform
B. Hanging weight platform
C. Loading weight platform
D. Varying weight platform
Question 12
The temperature of a thermistor increases, when the value of its resistance
A. Remain constant
B. Increase
C. Decrease
D. Depends on the heating material
Question 13
Transmission line are used for
A. Output signal
B. Input signal
C. Signal transfer
D. All of the mentioned
Question 14
What are the features of instrumentation amplifier?
A. Low noise
B. High gain accuracy
C. Low thermal and time drift
D. All of the mentioned
Question 15
What instrument is used to amplify output signal of transducer
A. Peaking amplifier
B. Instrumentation amplifier
C. Differential amplifier
D. Bridge amplifier
Question 16
What is the disadvantage of using LH0036 instrumentation op-amp?
A. Extremely stable
B. Relatively expensive
C. Accurate
D. All of the mentioned
Question 17
What is the unit of strain gage?
A. Ω/oC
B. Lux
C. Newton / meter2
D. Volts
Question 18
What will be the resistance of a photoconductive cell in darkness?
A. 1000-3000Ω
B. 100MΩ
C. 250-500Ω
D. None of the mentioned
Question 19
What will be the resultant circuit, when the thermistor in the bridge transducer is replaced by a strain gage?
A. Differential input and differential output amplifier
B. Light intensity
C. Analog weight scale
D. None of the mentioned
Question 20
Which material is used for photoconductive cells?
A. Germanium
B. Cadmium sulphide
C. Lithium
D. Phosphorous
Question 21
Which type of resistive transducer is most commonly used?
A. Thermistor
B. Photoconductive cell
C. Strain gage
D. All of the mentioned
Question 22
Which type of thermistor is chosen for temperature measurement and control?
A. High temperature coefficient of resistance
B. Low temperature coefficient of resistance
C. Positive temperature coefficient of resistance
D. None of the mentioned
Question 23
Why output of transducer is not directly connected to indicator or display?
A. Low level output is produced
B. High level output is produced
C. No output is produced
D. Input is fed directly