4.1. Figure 1 shows three points near a very long charged rod. The distance between A and B, the distance between A and C, and the distance between B and C are all equal. (a) If an electron moves from B to C, would the work done by the electric field be pos- itive, negative, or zero? Explain. ative, (b) If the work to move some charge from A to B is 2.1 J and the work to move that same charge from A to C is 8.4 J how much work would be done to move that same charge from C to B? Explain. (c) Is the potential difference from A to C positive, negative, or zero? Explain. A B0 00 + + + + + + Figure 1

4.1. Figure 1 shows three points near a very long charged rod. The distance between A and B, the distance between A and C, and the distance between B and C are all equal. (a) If an electron moves from B to C, would the work done by the electric field be pos- itive, negative, or zero? Explain. ative, (b) If the work to move some charge from A to B is 2.1 J and the work to move that same charge from A to C is 8.4 J how much work would be done to move that same charge from C to B? Explain. (c) Is the potential difference from A to C positive, negative, or zero? Explain. A B0 00 + + + + + + Figure 1