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## Homework Statement

An electron with kinetic energy 1.60 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 24.0 cm.

a Find the speed of the electron.

b Find the Magnetic Field

## Homework Equations

k=1/(2mv^2)

B=mvqr

## The Attempt at a Solution

I first converted keV to Joules which came out to be 2.5635 e-16 J

I then made the equation to solve for v : v=sqrt(1/2mk)

But I came out with the velocity being e22 4.627 km/s which is not right

PLease help!!!!