Physics · Current Electricity
यदि किसी समरूप तार को खींचकर उसकी लम्बाई दोगुनी कर दी जाए, तो उसके विशिष्ट प्रतिरोध (प्रतिरोधकता) पर क्या प्रभाव पड़ेगा?
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