Instrumentation Amplifier – 3 MCQ’s

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This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Instrumentation Amplifier – 3″.

1. Which type of resistive transducer is most commonly used?
a) Thermistor
b) Photoconductive cell
c) Strain gage
d) All of the mentioned

2. What is the unit of strain gage?
a) Ω/oC
b) Lux
c) Newton / meter2
d) Volts

3. Strain gage are used to monitor change in
a) Pressure
b) Torque
c) Displacement
d) All of the mentioned

4. Which type of strain gage has better resolution?
a) Semiconductor strain gage
b) Wire strain gage
c) Wire and Semiconductor strain gage
d) None of the mentioned

5. 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

6.

Find the value of pair of resistance values when the resistance changes by 0.3Ω in each gage


RT1, RT2, RT3, RT4 are unstrained gage resistance. If the resistance change in each gage is 0.3Ω. Choose the correct option?
1. RT1 and RT3 increases by 0.3Ω
2. RT2 and RT4 decreases by 0.3Ω
3. RT1 and RT3 increases by 0.3Ω
4. RT2 and RT4 decreases by 0.3Ω
a) 3 and 4
b) 1 and 2
c) 1 and 4
d) 2 and 3

7. 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

8. 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

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