Final answer:
The question lacks context and clear information, making it impossible to determine the value of EC with the given details.
Step-by-step explanation:
The information provided seems to be mixed content from different areas, including equations and values that should apply to a specific context like physics (electric circuits, magnetic fields) or chemistry (cell potentials). However, there is no coherent problem statement or equation that directly leads to finding the value of EC. Truly understanding and accurately calculating such a value would first require a clear and complete problem description, which is not provided here. To attempt such a calculation, one would typically need relevant formulas or a specific context within mathematics, physics, or chemistry that defines what EC represents and how it relates to the given values or other variables in the problem.