Recent data show that microwaves (MW) and extremely low-frequency (ELF) magnetic fields at low intensities affect conformation of nucleoids in bacterial E. coli cells and human lymphocytes. Experimental data suggest that magnitude of the effects of both MW and ELF depend on frequency and static magnetic field. We have previously proposed the physical model for the effects of combined ELF/static magnetic fields on the charged DNA-domain/nucleoid. In this article, we present the model of slow non uniform rotation of the charged DNA-domain/nucleoid for the combined effects of MW and static magnetic field. The solution of this model suggests that the combined action of MW and static magnetic field results in slow non uniform rotation of nucleoid with angular speed that depends on Larmor frequency. The model predicts that non thermal effects of MW are dependent on carrier frequency and also static magnetic field in the area of exposure.