Physics-
General
Easy

Question

In a region magnetic field along x axis changes with time according to the given graph. If time period, pitch and radius of helix path are T0, P0 and R respectively then which of the following is incorrect if the particle is projected at an angle q0 with the positive x–axis in x–y plane ?

  1. text At  end text t equals fraction numerator T subscript 0 end subscript over denominator 2 end fraction comma text  co-ordinates of charge are  end text open parentheses fraction numerator P subscript 0 end subscript over denominator 2 end fraction comma 0 comma negative 2 R subscript 0 end subscript close parentheses    
  2. text At  end text t equals fraction numerator 3 T subscript 0 end subscript over denominator 2 end fraction comma text  co-ordinates of charges are  end text open parentheses fraction numerator 3 P subscript 0 end subscript over denominator 2 end fraction comma 02 R subscript 0 end subscript close parentheses    
  3. Two extremes from x–axis are at a distance 2 R subscript 0 end subscript from each other    
  4. Two extremes from x–axis are at a distance 4 R subscript 0 end subscript from each other    

The correct answer is: text At  end text t equals fraction numerator 3 T subscript 0 end subscript over denominator 2 end fraction comma text  co-ordinates of charges are  end text open parentheses fraction numerator 3 P subscript 0 end subscript over denominator 2 end fraction comma 02 R subscript 0 end subscript close parentheses

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