(b) What is the potential difference between the points at x = 0 and x = xmax𝑥 = 𝑥max ?

To answer this question, we need more context. The potential difference between two points in a field (electric, gravitational, etc.) depends on the properties of the field and the specific locations. In this case, we need to know the nature of the field and the value of xmax.

However, in a general sense, the potential difference (V) between two points in an electric field can be calculated using the formula:

V = Ed

where E is the electric field strength and d is the distance between the two points.

So, if we know the electric field strength and the value of xmax, we can substitute them into the formula to find the potential difference.

Please provide more details so I can give a more accurate answer.