An electron travelling at perpendicular to a uniform magnetic field experiences a force of

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

An electron travelling at

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

perpendicular to a uniform magnetic field experiences a force of

1.6\times10^{-14}\,\text{N}

. Determine the magnitude of the magnetic field.