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प्रश्न
A platinum wire is used as the thermometric substance in a resistance thermometer. What is the thermometric property being utilised here?
विकल्प
Volume expansion of a liquid
Pressure of a gas at constant volume
Electromotive force (EMF) between two metals
Electrical resistance of a metal
MCQ
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उत्तर
Electrical resistance of a metal
Explanation:
In a resistance thermometer, the thermometric substance is a platinum wire, and the thermometric property is its electrical resistance, which changes measurably and predictably with temperature. This type of thermometer works over a wide range of −200 °C to 1200 °C and is known for very high accuracy.
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