When the differential is active, how does the rotational speed of the inner wheel compare with that of the outer wheel?

When the differential is active, it allows the two wheels on an axle to rotate at different speeds. This is especially important when turning, as the outer wheel must travel a longer distance compared to the inner wheel. Therefore, the rotational speed of the outer wheel is greater than that of the inner wheel during a turn.

In a turning scenario, the differential mechanism compensates for this difference, enabling the outer wheel to rotate faster while the inner wheel rotates slower. This helps maintain traction and stability, reducing tire wear and improving the overall handling of the vehicle. The other options do not accurately describe how a differential functions; the inner wheel cannot be faster than the outer wheel during a turn, and both wheels cannot rotate at the same speed if the vehicle is navigating a curve. Additionally, the inner wheel does not stop rotating under normal operating conditions.

Thus, it is the outer wheel that rotates faster when the differential is active, particularly during maneuvers such as turning.