A proton of speed enters a magnetic field at an angle of

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

A proton of speed

1.0\times10^{7}\,\text{m s}^{-1}

enters a

0.20\,\text{T}

magnetic field at an angle of

60^{\circ}

. After completing exactly five turns of its helical trajectory, the total length of the path traced by the proton is closest to (a)

14.2\,\text{m}

(b)

16.4\,\text{m}

(c)

8.7\,\text{m}

(d)

20.0\,\text{m}