  We study the electron transport in three terminal junctions and quantum rings
looking for the classical deflection of electron trajectories in presence of
intersubband scattering. We indicate that although the Aharonov-Bohm
oscillations and the Lorentz force effects co-exist in the low subband
transport, for higher Fermi energies a simultaneous observation of the both
effects is difficult and calls for carefully formed structures. In particular,
in quantum rings with channels wider than the input lead the Lorentz force is
well resolved but the Aharonov-Bohm periodicity is lost in chaotic scattering
events. In quantum rings with equal length of the channels and $T$-shaped
junctions the Aharonov-Bohm oscillations are distinctly periodic but the
Lorentz force effects are not well pronounced. We find that systems with the
wedge shaped junctions allow for observation of both the periodic Aharonov-Bohm
oscillations and the magnetic deflection.
