Chapter 19.4, Problem 1aTH

A small test charge $-q_o$ travels from point X to point Y along the circular are shown.

i. Draw an arrow on the diagram at each point (X and Y) to show the direction of the electric force on the test charge at that point. Explain why you drew the arrows as you did.
ii. Is the work done on the charge by the electric field positive, negative, or zero? Explain.
iii. Is the electric potential difference $△V_{XY}$positive, negative, or zero? Explain.