hi everyone, i would like to ask some quick questions that i find confusing. first, electromotive force is the energy supplied by a battery / power source, to ''push'' the charge through a circuit right? its unit is in Volts. then, potential difference is defined as the work done to push 1 Coulomb of charge from point B back to point A. and its units is also in Volts. So imagine a complete circuit. when a charge leaves the battery, lets say it contains 9 Joules of electrical energy / charge ( this is the E.M.F) then when it crosses a resistor. it drops from 9 Joules of Electrical energy to 6Joules. the drop is 3V, therefore potential difference is 3V. now what do i call the remaining 6 Joules of electrical energy per charge? is it stilled called the EMF? I asked my teachers, they say its just simply called voltage. which i don't really understand what is the definition of voltage. i've read wiki but it doesn't help , the term voltage is confusing. i'm not sure they are referring to EMF or P.d. thanks for the help in advance and i apologize for any mistakes in my statement as I am still learning.