Final answer:
Increasing the magnitude of charge difference across the membrane leads to a stronger electrical driving force, as part of the electrochemical gradient necessary for biological processes like nerve impulse conduction.
Step-by-step explanation:
As the magnitude of charge difference across the membrane increases, the magnitude of the electrical driving force would increase across that membrane. The electrical driving force is part of what constitutes the electrochemical gradient, which includes both the chemical concentration gradient and the electrical charge gradient. A larger charge difference leads to a stronger electrical gradient and therefore a more potent driving force for the movement of ions across the membrane. This is crucial in biological processes such as the conduction of electrical impulses along nerve cells.