An Electron with a Speed of 6 $\circ$ to the Magnetic Field Lines

An electron with a speed of 6.00 * 10⁵ m/s enters a uniform magnetic field of 0.0600 T at an angle of 61.4 ^$\circ$ to the magnetic field lines.The electron will travel in a helical path.Find the radius of the helical path.

A) 5.00 * 10^-5 m
B) 4.20 * 10^-5 m
C) 4.80 * 10^-5 m
D) 4.50 * 10^-5 m

Correct Answer:

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