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धातु की एक छड़ का अनुप्रस्थ-परिच्छेद `1.0" सेमी"^(2)` है | उसे `0^(@)C` पर दोनों सिरों पर कस दिया गया है | छड़ को `100^(@)C` तक गर्म करने पर इसके सिरों पर उत्पन्न बल की गणना कीजिए | धातु का रेखीय प्रसार गुणांक `1.2xx10^(-5)" प्रति"""^(@)C` तथा यंग-प्रत्यास्थता गुणांक `2.0xx10^(11)" न्यूटन"//"मीटर"^(2)` है |

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