Infectious particles passed the accelerating potential difference, flew into crossed at right angles to the electric E = 400 V / m and magnetic B = 0.2 T field. Determine the accelerating potential difference when moving perpendicular fields, the particle does not experience deviations from the straight path. The charge to the mass of the particle is equal to 9.64 x 10 7 cells / kg.

Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
If you have any questions to address, please. I'll try to help.