Difference between a magnetic field and an electric field

[Nicholas.D]

Homework Statement

Describe the difference between a magnetic field and an electric one.

Homework Equations

N/A

The Attempt at a Solution

I thought the two were the same or at least linked somehow. I don't understand why a proton will not achieve an increase of decrease in Ek when going through a magnetic field, but will under an electric field.

 

[tiny-tim]

Hi Nicholas!

Have a look at http://en.wikipedia.org/wiki/Lorentz_force"