Suppose that there is a positively charged particle and a negatively charged particle in free space. The electric field of the positive charge causes a difference in potential between the position of the negatively charged particle and the positively charged particle. This, causes the negatively charged particle to move towards the positive charge without resistance (i think???). Couldn't that be considered as an electric current. Now, if the source of potential difference is a battery, free space is said to have high resistance, so no current can flow. Why can't the electrons just move towards the positive electrode of the battery? Why does free space have resistance?