The peculiarities in the dynamics of the director reorientation in confined nematic liquid crystals (LCs) under the influence of a strong electric field E directed at an angle alpha to the magnetic field B have been investigated theoretically on the basis of the hydrodynamic theory including the director motion with appropriate boundary and initial conditions. Analysis of the numerical results for the turn-on process, when the strong electric field E is suddenly applied, provides an evidence for the appearance of the spatially periodic patterns in confined LC film. Calculations show that when the angle alpha tends to be 90 degrees, the optimum wavelength, giving the fastest response, provides the lower effective viscosity gamma(eff) (alpha), which is less than one in the bulk nematic phase. So, a lower value of gamma(eff) (alpha) gives a faster relaxation times, as observed experimentally by using the time-resolved deuterium NMR spectroscopy. (C) 2017 Elsevier B.V. All rights reserved.