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Question

A screw gauge has 1.0mm pitch and 200 divisions on the circular scale. The least count of the instrument is

  1. 5 cross times 10 to the power of negative 3 end exponentmm    
  2. 5 cross times 10 to the power of negative 4 end exponentmm    
  3. 5 cross times 10 to the power of negative 2 end exponentmm    
  4. 5 cross times 10 to the power of negative 5 end exponentmm    

The correct answer is: 5 cross times 10 to the power of negative 3 end exponentmm


    L C equals fraction numerator 1 over denominator 200 end fraction semicolon equals fraction numerator 1 over denominator 2 end fraction cross times 10 to the power of negative 2 end exponent equals 5 cross times 10 to the power of negative 3 end exponent m m

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