A

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Q. If a copper wire is increased to double its length, its resistance will become

  • (A) Four times
  • (B) One–fourth
  • (C) Double
  • (D) Half
  • Correct Answer - Option(A)
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Explanation by: Admin

When the wire is stretched to double the length , the area of cross section gets reduced to half. So when the wire is stretched, the resistance multiplies by four times.

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