A tiny dust particle in the form of a long thin needle has charges of ±7.14 pC on its ends. The length of the particle is 3.75μm.
(a) Which location is at a higher potential: (1) above the positive end, (2) above the positive end, or (3) both locations are at the same potential?
(b) Compute the potential at the two points in part (a).
(c) Use your answer from part (b) to determine the work needed to move an electron from the near point to the far point.