PHYSICS HONORS 1) proton and an electron in a hydrogen atom are separated on the average by about 5.3*10^-11m. What is the magnitude and direction of the electric field set up by the proton at the potion of the electron? 2) An electric field of 2.0*10^4N/C is directed along the positive x-axis. a. What is the electric force of an electron in this field? b. What is the electric force of a proton in this field? 3) A +2.2*10^-9C charge is on the x-axis at x=1.5m, a +5.4*10^-9C charge is on the x-axis at x= 2.0m and a +3.5*10^-9 C charge is at the origin. Find the net force of the charge at the origin. 4) A charge of +4.2*10^-5C sits at the origin. Another charge of +5.4*10^-5C sits at x=0.8m to the right of the first charge. Find the electric field at a point with coordinates (0.4m, 0.3m)