1. The problem statement, all variables and given/known data Some hydrogens and deuterium ions are accelerated by a potential difference V. These ions entered then in a region with a magnetic field B orthogonal to their velocity. In the position H and K (along the axis parallel to the velocity) there are two sensors and the distance between them is d. Find the the V you need to make the hydrogen ions go towards H and deuterium towards K 2. Relevant data d=0.8cm B=0.4T q(e)=1.6*10(-19) m(H)=1.67*10^-27 m(D)=3.34*10^-21Kg 3. The attempt at a solution Velocity of the ions after the acceleration by a potential difference V: qV(1)=1/2mv^2+qV(2) ==> v=sqrt[(2qV)/(m)] where m is m(D) or m(H) motion of the ions in the magnetic field: circular motion with radius: r(D)=v(D)m(D)/qB r(H)=v(H)m(H)/qB The distance between the two sensors is d, so r(D)-r(H)=d ==> 4qV=dqB ==> V=0,00008V Is this right?