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Krishna Sharma • 46.84K Points
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Q. यदि तांबे के तार को दो गुना बढ़ा दिया जाये, तो उसका प्रतिरोध हो जायेगा?

(A) एक-चौथाई
(B) चार गुना
(C) आधा
(D) दोगुना
Correct Answer - Option(B) Science

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