Physics-
General
Easy

Question

Two negatively charges particles having charges e subscript 1 end subscript and e subscript 2 end subscript and masses m subscript 1 end subscript and m subscript 2 end subscript respectively are projected one after another into a region with equal initial velocity. The electric field E is along the y-axis, while the direction of projection makes an angle a with the y-axis. If the ranges of the two particles along the x-axis are equal then one can conclude that

  1. e subscript 1 end subscript equals e subscript 2 end subscript and m subscript l end subscript equals l    
  2. e subscript 1 end subscript equals e subscript 2 end subscriptonly    
  3. m subscript 1 end subscript equals m subscript 2 end subscript only    
  4. e subscript 1 end subscript m subscript 1 end subscript equals e subscript 2 end subscript m subscript 2 end subscript    

The correct answer is: e subscript 1 end subscript equals e subscript 2 end subscript and m subscript l end subscript equals l


    Here, effected gravitational acceleration is
    g to the power of ´ end exponent equals fraction numerator m g minus q E over denominator m end fraction
    therefore blank R equals fraction numerator v subscript 0 end subscript superscript 2 end superscript sin invisible function application 2 alpha over denominator g ´ end fraction
    It means, g ’ for both particles are same
    This is possible when
    m subscript 1 end subscript equals m subscript 2 end subscript and e subscript 1 end subscript equals e subscript 2 end subscript

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