1. Why can we not add the x- and y-components of the electric field caused by charges to get the net electric field on a point? 2. Why do electrons tend to follow a curve line as it enters two parallel plates even if there is the effect of the gravitational force? 3. Suppose a region contains two positive and four negative charges. What will be the direction of the electric flux as it passes through the surface? 4. Determine the change in the distance between two equal charges if the electric potential energy Ue increases four times. 5. How are the concepts of potential and potential difference applied in circuitry? 6. If points A and B are at a similar electric potential, does it follow that no work is exerted to move a charged particle to a certain distance? 7. Do two car batteries which have the same voltage contain the same amount of energy? Explain your answer. 8. If a power line of high voltage accidentally falls on a car such that its body is at a potential of 9 550 V relative to the ground, will the people inside this car be hurt? Why or why not? 9. Explain the analogy between equipotential surfaces and a topographic map. 10. Suppose a battery has been charged such that its potential difference is constant. Once the capacitor has been charged maximally, the battery will be removed from the circuit. What will happen to the charge if the plates will be moved closer together? For 11-12: Suppose a fully-charged capacitor has been detached from a battery and a dielectric was inserted between its plates. 11. How will the potential difference be affected? 12. What will happen to the magnitude of the electric field? 13. What can you say about the picture below?