A DC motor has the following characteristics.
Rating: 35kW
Operation: 350 V, draws 90A, operates at a speed of 1100 rev/min when supplying full load.
Shunt: Field resistance is 150 Ohm and armature resistance is 0.5 Ohm
Poles: 6
Armature: Wave wound with 500 conductors
What is the value of the friction losses?