How Do You Calculate the Electrical Charge of a Particle?

[mintalcase]

Homework Statement

I need help with the problems stated below, I know i could figure them out if somebody would show me the proper formulas, and maybe a quick explanation of the variables used in the formula ?

Homework Equations

A particle moves through a distance of 10 m along an electric field of strength 75 N/C. Its electrical potential energy decreases by 4.8 x 10-16 J. What is the charge of the particle?

A particle moves through a distance of 10 m along an electric field of strength 75 N/C. Its electrical potential energy decreases by 4.8 x 10-16 J. What is the potential difference between the initial and final locations of the particle?

An electron moves 4.5 m in the direction of an electric field of strength 325 N/C. The change in electrical potential energy is:

Which one of the following relations is correct?

The Attempt at a Solution

I have not made an attempt at solving, however i am currently reading through my textbook in search of formulas that may help.

 

[wbandersonjr]

An equation dealing with electric potetial energy would help you.

 

[mintalcase]

An equation dealing with electric potetial energy would help you.

any chance of you giving me that formula ?

 

[MisterX]

Do you know the relationship between force and work?