What is the effect of the magnetic field on the protons? View Available Hint(s) What is the effect of the magnetic field on the protons? The protons are accelerated to the left, toward the S magnetic pole. The protons are accelerated to the right, toward the N magnetic pole. The protons are accelerated upward. The protons are accelerated downward. The protons are not accelerated, since the magnetic field does not change their speed.