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When a wire is stretched and its radius becomes r/2, then its resistance will be
  • a)
    16 R
  • b)
    4 R
  • c)
    2 R
  • d)
    0
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
When a wire is stretched and its radius becomes r/2, then its resistan...
In strectching condition Resistance is inversely proportional to r4 since R is inversely proportional to A2 and area is directly proportional to r2(in sterching condition) so the ans should be A option which is 16 R
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Community Answer
When a wire is stretched and its radius becomes r/2, then its resistan...
In strectching condition Resistance is inversely proportional to r^4 since R is inversely proportional to A^2 and area is directly proportional to r^2(in sterching condition) so the ans should be A option which is 16 R
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