Here's the question you clicked on:
shortcake1970
how much energy would an electron acquire if it moved through a potential difference of 100kV?
E = eV where e is electron charge is equal to 1.67 x 10^-19. and V is potential different
great! thank you :)
i have one more...what is the force per meter of lenght on a wire carrying a .5A current due to a .5 tesla-magnetic field?
Answer is very simple in natural units: Energy will be 100 keV
Use \[F = BIL \] for that one, but you will solve for \[ \frac{F}{L} \] to get the force per unit length.