What is the Kinetic Energy of an Alpha Particle Moving from Point A to Point B?

[Quincy]

Homework Statement

Point A is at a potential of +250 V, and Point B is at a potential of -150 V. An alpha particle is a helium nucleus that contains 2 protons and 2 neutrons. An alpha particle starts from rest at A and accelerates toward B. When the alpha particle arrives at B, what Kinetic energy (in electron Volts) does it have?

Homework Equations

1 eV = 1.6 x 10^-19 J, W = -(EPEb - EPEa), V = EPE/q

The Attempt at a Solution

Vb - Va = -150 - 250

Vb - Va = -400

 

[Kurdt]

You know the potential difference and you have the charge. If the charge is accelerated through that PD then all the potential energy will be converted to kinetic energy.