Physics
Physics
Problem
A uniform electric field is set with two parallel plates 4 cm apart. The top plate is connected to a supply kept at 50 V. The bottom plate is kept at a potential of 10 V. a. Suppose a 1 C charge was sitting on the underside surface of the top plate. How much electrical potential energy would it have? b. Suppose the 1 C charge sat on the upper side of the bottom plate. How much electrical potential energy would it have? c. How much work would have to be done to move the 1 C charge from the bottom plate to the top plate? d. In answering part c above, was it necessary to consider the *actual* path along which the 1 C charge would move?Intuitive explanation
The key insight is that a uniform field between parallel plates depends only on the potential difference and the distance between them—not on the absolute voltages. Calculate the voltage drop ( V), then divide by the separation to find the field strength. This tells you how much the electric field "pushes" per unit distance, which is the foundation for finding forces on charges or potential at any point between the plates.
Intuitive explanation
The key insight is that a uniform field between parallel plates depends only on the potential difference and the distance between them—not on the absolute voltages. Calculate the voltage drop ( V), then divide by the separation to find the field strength. This tells you how much the electric field "pushes" per unit distance, which is the foundation for finding forces on charges or potential at any point between the plates.