Question

Can a uniform magnetic field be used to speed up a charged particle explain

Answer 1

experimentally it was found that a charged particle in motion experiences force

F=VB sinθ where V=velocity of charged particle, B= uniform magnetic field flux density and θ is the angle between V and B.

If V=0 , then F=0, Force on stationary charge by magnetic field is zero. Magnetic field only deflects the moving charge.

If θ=0, then also F=0, if charged particle is travelling in the same direction of the magnetic field, the charged particle continue to move with the same velocity in the same direction.

For speeding charged particle electric field only suitable

F=QE where Q is charge and E is electric field strength.