A positively charged particle projected towards the east is deflected northwards by a magnetic field. The magnetic field could be directed

Step-by-step solution

The magnetic force on a moving charge is given by F = q( v B ) . Given that the particle is positively charged ( q > 0 ), the direction of the force is the same as the direction of v B . Let the east direction be along the positive x -axis ( i ), the north direction be along the positive y -axis ( j ), and the upward direction be along the positive z -axis ( k ). The velocity of the particle is v = v i . The magnetic force is F = F j . Let the magnetic field be B = B_x i + B_y j + B_z k . Substituting these into th