Physics · Current Electricity
यदि किसी तांबे के तार को खींचकर उसकी लंबाई उसकी मूल लंबाई से दोगुनी कर दी जाए, तो उसकी प्रतिरोधकता (resistivity) पर क्या प्रभाव पड़ेगा?
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