Why is it important to have equal lengths of graphite and copper?

Having equal lengths of graphite and copper is important in applications like electrical contacts or conductive pathways to ensure consistent electrical performance and thermal conductivity. Disparities in length can lead to uneven resistance, potential overheating, or inefficient energy transfer. Additionally, equal lengths help maintain mechanical balance, reducing stress and wear on the materials during operation. This uniformity is crucial for reliability and longevity in various engineering applications.