An electron is projected horizontally into the space between two oppositely charged metal plates. the electric field between the plates is 500.0 n/c, directed up. (a) while in the field, what is the force on the electron

Force of electric field on electron is given by

here

E = 500 N/C

here force is given by

So above is the force on an electron.

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

e/c, where e is its total energy