Answer:
ZERO
Explanation:
As we know that force due to magnetic field on moving charge is given by
[tex]\vec F = q(\vec v \times \vec B)[/tex]
now here we can say that the force due to magnetic field is always perpendicular to the velocity and it is also perpendicular to the magnetic field.
So we can say that
[tex]\vec F. \vec v = 0[/tex]
so power due to magnetic field is always zero
which shows that rate of work done by magnetic field on moving charge is zero
so here the work done by magnetic field is always zero
