Explain the difference between a polarized potential and an open-circuit potential.

• A. Open-circuit potential is measured with current flowing; polarized potential is measured with no current.
• B. Open-circuit potential is the potential under applied bias; polarized potential is at zero current.
• C. Open-circuit potential is measured with no current; polarized potential is the potential when a current flows.
• D. They are the same; both measured at equilibrium.

Answer: (C)