Question

When an electrically changed particle enters into a magneticfield B it experiences a force

given by

F = q(v * B);

where q is the charge and v is the velocity of the particle.Suppose a particle with unit charge

q = 1 is moving with velocity v = 10i.

(a) What force F needs to be applied to the particle in order tochange its course to u = 10i+k?

(b) What magnetic field B needs to be created in order toproduce that force?

1