2.How do we express the change in the potentialenergy from a to b?3.How do we derive the expression for the workdone in the process?Can you do the same analysis for a negative chargemoving (1) against and (2) with the electric field?Initialposition (b)X₁initialposition (a)x-axis Activity 2.1. Solving for Electric PotentialConsider the analysis for a test charge that goes with the electric field. Now, considerthe same test charge moving against the electric field, as shown in the figure onpage 31. Answer the following questions:301. How do we express the electric force associated with the positions x1 Unit I Electricity and MagnetismAand x?

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