Lab Activity 1: Messy Reality of Electric Potential This experiment examines the electric potential in and around a charged conductor. The principal equipment you need for the experiment consists of a 5 V DC power supply, a digital voltmeter (on Capstone), and a graphite paper with a conductive pattern. Keep in mind that the graphite paper is a slightly conductive paper and does in fact carry a small current (moving charge) when you apply a battery across it. So, even this experiment is not an accurate representation of static equilibrium! But, it actually works quite well