Question

An electron is moving through a magnetic field with a magnitude of 0.000045 T. If the electron is moving at a speed of 200,000 m/s, what is the magnetic force on the particle?

Answer 1

$B =4.5{\cdot}10^{-5}T$

$v=2{\cdot}10^{5}{\frac{m}{s}}$

$q=1.6{\cdot}10^{-19}C$

Lorentz force:

$F=q{\cdot}v{\times}B=1.6{\cdot}10^{-19}{\cdot}2{\cdot}10^{5}{\times}4.5{\cdot}10^{-5}= =14.4{\cdot}10^{-19}(N)$