A. A small positive test charge +qtest is moved from point A to point B, toward a sphere with charge +Q. 1. Is AUE, AB positive, negative, or zero? Explain. 2. Suppose the magnitude of the test charge quest were halved. Would AUE, AB change? If so, how? If not, explain why not. +Q B A 3. Would the ratio AUE, AB/qtest change? If so, how? If not, explain why not. B. The quantity AUE, if/qtest is called the electric potential difference between the initial and final positions of the test charge. It is represented as AV->f. IS AVAB, the electric potential difference from point A to point B, positive, negative, or zero? Explain your reasoning. C. Would the magnitude or sign of AVAB above change if: the magnitude of the test charge were increased? Explain your reasoning. the sign of the test charge were changed? Explain your reasoning. the magnitude of the charge on the sphere were decreased? Explain your reasoning. Based on your answers above, does AVA-B depend on the test charge, the sphere, or both? > Discuss your responses to section II with a tutorial instructor before continuing.