Physics-
General
Easy

Question

Which of the following rods of same material undergoes maximum elongation when subjected to a given force?

  1. L= 1m, d = 2 mm  
  2. L= 1m, d = 1 mm  
  3. L= 2m, d = 1 mm  
  4. L= 2m, d = 2 mm  

The correct answer is: L= 2m, d = 1 mm


    As l equals fraction numerator F over denominator pi open parentheses fraction numerator d to the power of 2 end exponent over denominator 4 end fraction close parentheses end fraction cross times fraction numerator L over denominator Y end fraction s o comma blank l proportional to fraction numerator L over denominator d to the power of 2 end exponent end fraction
    fraction numerator L over denominator d to the power of 2 blank end exponent end fraction i s blank m a x i m u m blank f o r blank o p t i o n blank open parentheses c close parentheses.

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