Step 1: Understand the concept of resistance in a cell.
In a cell, the opposition to the flow of current within the electrolyte is referred to as the internal resistance.
It is due to the resistance of the electrolyte and the internal parts of the cell.
Step 2: Identify the correct term.
External resistance refers to the resistance outside the cell in the external circuit.
Internal resistance is the term that specifically refers to the opposition inside the cell.