- #1

- 42

- 5

## Homework Statement

A moving particle encounters an external electric field that decreases its kinetic energy from 9480 eV to 8260 eV as the particle moves from position

*A*to position

*B*. The electric potential at

*A*is -43.0 V, and that at

*B*is +25.0 V. Determine the charge of the particle. Include the algebraic sign (+ or -) with your answer

## Homework Equations

deltaE = q*deltaV

## The Attempt at a Solution

I got the solution correct using that formula, I was just wondering why the solution is positive? I thought NEGATIVE charge should flow from low (-43.0 V) to high (+25.0 V) voltage.

Also, does anyone know any good resources to learn the rules of electricity e.g. electrons flow from negative to positive