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**1. Homework Statement**

What is the minimum radius of curvature for an alpha particle, He, moving at 2.0x10^-6m/s in a magnetic field of 2.9x10^-5T?

**2. Homework Equations**

F=qvBsin(theta)...then F=BILsin(theta)

**3. The Attempt at a Solution**

F=qvBsin(theta)

=(1.602x10^-19)(2.0x10^6)(2.9x10^-5T)sin90

=9.2916x10^-18

F=BILsin(theta)......