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Formula for electric potential energy

by darksyesider
Tags: electric, energy, formula, potential
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darksyesider
#1
Apr20-14, 04:45 PM
P: 55
In a velocity selector apparatus, i had an electric potential set across two points, and a proton at rest at one end. The potential was 350 V.

My instructor used :

qV = 1/2 mv^2 to find the velocity at the end of the apparatus.

Where did the left hand side of the eqn come from??
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Doc Al
#2
Apr20-14, 05:42 PM
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Quote Quote by darksyesider View Post
qV = 1/2 mv^2 to find the velocity at the end of the apparatus.

Where did the left hand side of the eqn come from??
That describes the energy gained by a charge q moving through a potential difference V. (The work done by the field on the charge.)
Doc Al
#3
Apr20-14, 05:51 PM
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You may want to review this: Work done by electric field

Vb123
#4
Apr20-14, 07:54 PM
P: 2
Formula for electric potential energy

qv=(0.5)mv^2
This expression indicates Kinetic Energy gained by a body with charge q while moving in a region of Electric potential v.


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