A dc generator has a prime mover that provides a speed of 1315 rpm at a torque of 23.4 n-m. with this prime mover, the generator can generate voltage of 117.1 volts with an armature current of 17.6 amperes. if the terminal voltage is 103.7 volts and its load current is 11.4 amperes, determine rotational power losses in kw.