Magnetic Field Produced by Moving Charges Video Lessons

Concept

# Problem: A cosmic ray proton moving toward the Earth at 6.5 × 107 m/s experiences a magnetic force of 1.55 × 10-16 N .a) What is the strength of the magnetic field if there is a 45º angle between it and the proton’s velocity?

###### FREE Expert Solution

Magnetic force:

$\overline{){{\mathbf{F}}}_{{\mathbf{B}}}{\mathbf{=}}{\mathbf{q}}{\mathbf{v}}{\mathbf{B}}{\mathbf{s}}{\mathbf{i}}{\mathbf{n}}{\mathbf{\theta }}}$

Solving for B, substituting, and calculating:

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###### Problem Details

A cosmic ray proton moving toward the Earth at 6.5 × 107 m/s experiences a magnetic force of 1.55 × 10-16 N .

a) What is the strength of the magnetic field if there is a 45º angle between it and the proton’s velocity?