How Is the Force on a Helium Ion Calculated in a Magnetic Field?

[Mnemonic]

Homework Statement

What is the magnitude of the force experienced by a He2+ ion traveling with v = 1.3 × 10^5i m/s in a magnetic field B = 0.42 j T?

Homework Equations

F=qvbsinθ

The Attempt at a Solution

F=2*1.6e-19*1.3e5*0.42

I am unsure about the charge on the Helium ion.

Is it 2*1.6e-19?

 

[Geofleur]

Imagine a neutral He atom. Now strip off all the electrons. What is left? Two neutrons and two protons, so...

 

[Mnemonic]

Imagine a neutral He atom. Now strip off all the electrons. What is left? Two neutrons and two protons, so...

So the charge is 2*1.6e-19?

 

[Geofleur]

Yep.