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Question

The resistance of a platinum resistance thermometer of ice point, the steam point and the boiling point of sulphur are 2.50, 3.50 and 6.50Ω respectively. Find the boiling point of sulphur on the platinum scale. The ice point and steam point measure 0 and 100 respectively.

A
400
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B
500
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C
600
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D
700
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Solution

The correct option is A 400
t=RtR0R100R0×100=6.52.503.52.50×100
t=400
Temperature is equal to % increase of the quantity it is related to.

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