A proton of charge and mass enters a uniform magnetic field with initial velocity

PHYSICS · Subjective · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

A proton of charge

e

and mass

m

enters a uniform magnetic field

\mathbf{B}=B\hat{i}

with initial velocity

\mathbf{v}=v_x\hat{i}+v_y\hat{j}

. Find its velocity at time

t

in unit-vector notation.