question_answer

A particle of mass m carrying charge 'q' is projected with velocity (v) from point P towards an infinite line charge from a distance 'a'. Its speed reduces to zero momentarily at point Q which is at a distance a/2 from the line charge. If another particle with mass m and charge \[-q\]is projected with the same velocity v from point P towards the line charge. Its speed is found to be \[\frac{Nv}{\sqrt{2}}\]at point 'Q'. Find the value of N.

Answer:

2.00