The one-electron spectrum, pertinent to a quantum wire in the presence of a magnetic field, is obtained for parabolic and weakly nonparabolic confining potentials. Different orientations of the magnetic field are considered and the corresponding ac and do responses of the wire are evaluated, for electron scattering by impurities and/or phonons. The height of the power spectrum peak decreases as the magnetic field is tilted from the normal direction to that along the wire
