How much work does an electric field do in moving a proton

[mathcrzy]

Homework Statement

How much work does the electric field do in moving a proton from a point with a potential of +95 V to a point where it is -37 V? Express your answer both in joules and electron volts.
_____eV
_____J

Homework Equations

deltaPE = q * Vba

The Attempt at a Solution

PE = (-1.6e-19)(138)
PE = 2.2e-17 J

1.6e-19 / 12.2e-17 = .007 eV

 

[Ouabache]

you may want to recheck your calculation for Vba.

 

[mgb_phys]

You might also think about why you use eV for the units and what step this migth save you!