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A potentiometer cannot be used to:
- a)measure emf of a cell
- b)compare emf of two cells
- c)measure internal resistance of a cell
- d)measure unknown temperature
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A potentiometer cannot be used to:a)measure emf of a cellb)compare emf...
A potentiometer is used to:
1) Measure emf of a cell
2) Compare emf of two cells
3) Measure the internal resistance of a cell
Potentiometer can’t be used to measure unknown temperature.
1) Measure emf of a cell
2) Compare emf of two cells
3) Measure the internal resistance of a cell
Potentiometer can’t be used to measure unknown temperature.
Most Upvoted Answer
A potentiometer cannot be used to:a)measure emf of a cellb)compare emf...
Understanding the Potentiometer
A potentiometer is a versatile instrument primarily used in electrical measurements. It operates on the principle of comparing potential differences without drawing current from the circuit.
Uses of a Potentiometer
- Measure EMF of a Cell: Potentiometers can accurately measure the electromotive force (emf) of a cell by comparing it to a known reference voltage.
- Compare EMF of Two Cells: They are effective for comparing the emf of two cells side by side, allowing for precise measurements without loading the cells.
- Measure Internal Resistance of a Cell: By using the potentiometer in conjunction with a known load, one can determine the internal resistance of a cell by measuring the voltage drop across it when a current is drawn.
Limitations of a Potentiometer
- Measure Unknown Temperature: A potentiometer cannot measure temperature directly. While it can be used with temperature sensors (like thermocouples or RTDs), it does not provide a direct measurement of temperature itself. Instead, it measures voltage, which must be correlated to temperature through calibration and conversion formulas.
Conclusion
The correct answer, option 'D', highlights a key limitation of the potentiometer. While it excels in measuring electrical properties, it does not serve the direct purpose of measuring temperature, which requires specific sensors and conversion methods. The potentiometer remains a fundamental tool in electrical engineering but is not suited for thermal measurements.
A potentiometer is a versatile instrument primarily used in electrical measurements. It operates on the principle of comparing potential differences without drawing current from the circuit.
Uses of a Potentiometer
- Measure EMF of a Cell: Potentiometers can accurately measure the electromotive force (emf) of a cell by comparing it to a known reference voltage.
- Compare EMF of Two Cells: They are effective for comparing the emf of two cells side by side, allowing for precise measurements without loading the cells.
- Measure Internal Resistance of a Cell: By using the potentiometer in conjunction with a known load, one can determine the internal resistance of a cell by measuring the voltage drop across it when a current is drawn.
Limitations of a Potentiometer
- Measure Unknown Temperature: A potentiometer cannot measure temperature directly. While it can be used with temperature sensors (like thermocouples or RTDs), it does not provide a direct measurement of temperature itself. Instead, it measures voltage, which must be correlated to temperature through calibration and conversion formulas.
Conclusion
The correct answer, option 'D', highlights a key limitation of the potentiometer. While it excels in measuring electrical properties, it does not serve the direct purpose of measuring temperature, which requires specific sensors and conversion methods. The potentiometer remains a fundamental tool in electrical engineering but is not suited for thermal measurements.
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A potentiometer cannot be used to:a)measure emf of a cellb)compare emf of two cellsc)measure internal resistance of a celld)measure unknown temperatureCorrect answer is option 'D'. Can you explain this answer?
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A potentiometer cannot be used to:a)measure emf of a cellb)compare emf of two cellsc)measure internal resistance of a celld)measure unknown temperatureCorrect answer is option 'D'. Can you explain this answer? for Railways 2025 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about A potentiometer cannot be used to:a)measure emf of a cellb)compare emf of two cellsc)measure internal resistance of a celld)measure unknown temperatureCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Railways 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A potentiometer cannot be used to:a)measure emf of a cellb)compare emf of two cellsc)measure internal resistance of a celld)measure unknown temperatureCorrect answer is option 'D'. Can you explain this answer?.
A potentiometer cannot be used to:a)measure emf of a cellb)compare emf of two cellsc)measure internal resistance of a celld)measure unknown temperatureCorrect answer is option 'D'. Can you explain this answer? for Railways 2025 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about A potentiometer cannot be used to:a)measure emf of a cellb)compare emf of two cellsc)measure internal resistance of a celld)measure unknown temperatureCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Railways 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A potentiometer cannot be used to:a)measure emf of a cellb)compare emf of two cellsc)measure internal resistance of a celld)measure unknown temperatureCorrect answer is option 'D'. Can you explain this answer?.
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