# Problem: An electron with an initial speed of 5.00×105 m/s is brought to rest by an electric field.A. Did the electron move into a region of higher potential or lower potential?B. What was the potential difference that stopped the electron?C. What was the initial kinetic energy of the electron, in electron volts?

###### FREE Expert Solution

The change in the kinetic energy of the charged particle is proportional to the potential difference.

$\overline{){\mathbf{∆}}{\mathbf{K}}{\mathbf{=}}{\mathbf{-}}{\mathbf{q}}{\mathbf{∆}}{\mathbf{V}}}$

A.

When a negatively charged particle has a decrease in speed, the kinetic energy also decreases.

The electric potential energy increases.

79% (94 ratings) ###### Problem Details

An electron with an initial speed of 5.00×105 m/s is brought to rest by an electric field.

A. Did the electron move into a region of higher potential or lower potential?

B. What was the potential difference that stopped the electron?

C. What was the initial kinetic energy of the electron, in electron volts?