the applied e.m.f.

the torque required

the flux required

the speed of the motor

the power drawn in kVa

the power drawn in kW

the output power available at the shaft

the gross power

its losses are minimum

its current drainage is minimum

the applied e.m.f. is minimum

the load is minimum

reversing the supply connections

interchanging the armature and field connections

adding a resistance in the field circuit

reversing the armature connections or the field connections

zero

3000 r.p.m.

3600 r.p.m.

infinity