A Foreman of an automobile workshop wants to measure the temperature inside the piston of a car, whose temperature will be of the order of 700?C (accurate upto 1?C). The best thermometer to use is

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Q. A Foreman of an automobile workshop wants to measure the temperature inside the piston of a car, whose temperature will be of the order of 700?C (accurate upto 1?C). The best thermometer to use is

(A) Constant volume hydrogen thermometer
(B) Thermo electric thermometer
(C) Platinum resistance thermometer
(D) Optical pyrometer

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✅ Correct Answer: (B) Thermo electric thermometer

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