A thin, flexible rod of length L with radius R carries a total charge Q uniformly along its length. The rod is then bent into a semicircle, as shown in the figure. In this problem you will need to use integration to find the electric potential at the center.
1. Draw a physical representation of the situation defining all relevant quantities and symbols you use.
2. Find the electric potential at the center using integration.
3. Provide an evaluation of your result for part b. What does it tell you about the physics of the situation? Could this answer be expected without doing the integration? (Hint: write your answer to part b in terms of R and not in terms of L)
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