7. A uniform electric field is shown below. Draw equipotential surfaces. In which direction does the voltage decrease? If an electron is placed in the electric field at rest, draw the direction of the force. The electron moves from higher potential point to lower potential point or the other way around. If the potential difference between two locations of the electron is 5V, what is the change in potential energy of the electron. What is its speed at the end of the motion through 5V? -e

The problem describes a uniform electric field and asks several questions related to equipotential surfaces, voltage, force, potential energy, and velocity of an electron in the field.

Concepts and Principles:

• Electric field: A region around a charged object where an electric force is exerted on other charged objects.
• Electric potential: The amount of work needed to move a unit of positive charge from a reference point to a specific point in an electric field.
• Equipotential surfaces: Surfaces in an electric field where the electric potential is the same at all points on the surface.
• Voltage: The difference in electric potential between two points in an electric field.
• Force on a charged particle in an electric field: F = qE, where F is the electric force, q is the charge of the particle, and E is the electric field.
• Change in potential energy of a charged particle in an electric field: ΔU = qΔV, where ΔU is the change in potential energy, q is the charge of the particle, and ΔV is the change in voltage.
• Kinetic energy of a charged particle: $K=\frac{1}{2}m{v}^2$, where K is the kinetic energy, m is the mass of the particle, and v is the velocity of the particle.