What is the electric potential vtot at the center of the square? make the usual assumption that the potential tends to zero far away from a charge. express your answer in terms of q, d, and appropriate constants?

Explanation:

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.