a) How much work does the electric field do in moving a proton from a point with a potential of +175 V to a point where it is -45 V ? Express your answer in joules.
b) Express your answer in electron volts.
Work done by electric field=qΔV. Remember, positive work means the displacement and the force due to electric field are in the same direction and for negative work, the y are in opposite directions. See if your answer makes sense with this in mind. For the conversion, 1 J=6.242e18 eV.