पाइरोमीटर (Pyrometer) निम्नलिखित – McqOptions

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1.	पाइरोमीटर (Pyrometer) निम्नलिखित में से किसके मापन में प्रयुक्त होता है?
A.	उच्च ताप
B.	घनत्व
C.	आद्रता
D.	वायुमंडलीय दाब
Answer» B. घनत्व

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