A wire of length 'l' is gradually stretched so that its length increases to 3l. If its original resistance…

A wire of length 'l' is gradually stretched so that its length increases to 3l. If its original resistance is R, then its new resistance will be :
  1. 3R
  2. 6R
  3. 9R
  4. 27R

Solution

9R

Asked in: CBSE

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