This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Self Balancing Potentiometers”.
1. Standardization of potentiometer is used for ________________
a) Accuracy
b) Accuracy in measurement
c) Use of low voltage sources
d) None of the mentioned
View Answer
Explanation: Standardization of potentiometers are done for accuracy in measurement, and it is carried out using electrochemical cells of known potential.
2. Which of the following device is used for calibration of a potentiometer?
a) Electrochemical cell
b) Galvanometer
c) Variable dc source
d) All of the mentioned
View Answer
Explanation: Electrochemical cell of known potential is used for calibration of a potentiometer, ammeter is also used for this purpose.
3. Galvanometer used should be calibrated first.
a) True
b) False
View Answer
Explanation: Calibration of galvanometer is not needed since its only purpose is to display a null condition.
4. Which of the following cannot be measured using potentiometer?
a) DC voltage
b) Temperature
c) Resistance
d) None of the mentioned
View Answer
Explanation: Potentiometer can be arranged to measure different quantities like DC voltage, resistance, and temperature (using thermocouple potentiometer).
5. Which of the following is not possible?
a) Constant current potentiometer
b) Constant resistance potentiometer
c) Thermocouple potentiometer
d) None of the mentioned
View Answer
Explanation: Constant current, constant resistance and thermocouple potentiometers are different arrangements of potentiometers for measuring different parameters.
6. Galvanometer is used for _________________
a) Calibration of potentiometer
b) Indication of null position
c) Providing stability
d) All of the mentioned
View Answer
Explanation: Only use of galvanometer in potentiometer circuit is for the indication of null position.
7. Power consumption of unknown source connected will be _____________
a) Very high
b) Very low
c) Zero ideally
d) Always constant
View Answer
Explanation: Indication of null position in galvanometer means zero current is drawn be connected source.
8. A potentiometer cannot be used for calibration of ammeter.
a) True
b) False
View Answer
Explanation: For the calibration of ammeter, potentiometers can be used since it indicates current drawn by the externally connected device.
9. Which of the following devices cannot be used potentiometer as calibrating device?
a) Wattmeter
b) Energy meter
c) Voltmeter
d) Ammeter
View Answer
Explanation: Wattmeter, voltmeter, and ammeter can be used as potentiometer as calibrating device. The energy meter cannot use a potentiometer as calibrating device.
10. At null position, galvanometer reading will be _______________
a) Maximum
b) Zero
c) Unchanged for further reading
d) None
View Answer
Explanation: Null position is in which current drawn will be zero and galvanometer shows zero reading.
Sanfoundry Global Education & Learning Series – Instrumentation Transducers.
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