1. The problem statement, all variables and given/known data We conducted an investigation into wire length, current and resistance but kept track of the voltage rather than relying on the power pack setting. We noticed the voltmeter (measuring across the power pack) reading increased as the length of the wire increased though by only about 0.1 V from 10-100 cm lengths. 2. Relevant equations 3. The attempt at a solution Is this something to do with internal resistance and energy being lost due to the higher resistance?