A proton is shot tlu'ough from a potential energjr of 1.5keV (1 eV='l.6xl[}19 I}. You are trying to build a velocity selector that separates out 1.5keV protons. If the electric field is fixed at 50 kV/m, what does the magnitude of the magnetic eld need to be? {Answer in Tesla} A wire with a crurent of 30 A has been bent into a loop as shown in the figure. If the inner radius is 1.0 cm and the outer radius is 3.0 cm, what is the magnitude and direction of the magnetic field at the center of the arc (at the intersection of the dashed lines)? (Answer in ml} h ____________ A charged particle has a charge of 5.0 Inc and is moving along the firaxis. The moment it passes through the origin, a 0.30 ,uT magnetic field is measured on the x-axis at x = 2.5 can. If the magnetic field is pointing in the +2-direction, what is the velocity of the charged particle? Give speed and direction