A d.c shunt machine driven as motor has the following parameters: U I R U n AN ? 440V, AN ? 50A, A ? 0,6?, BK ? 3V, N ? 800min?1 and RE ? 176?. a) What value has the induced voltage Uq in the armature under nominal operation? b) Determine the electromagnetic (intrinsic) torque. c) What is the value of the efficiency ? of the motor, if Prbg ? 500W and PFe ? 600W is known? d) What value has the available torque M at the shaft?