A DC machine operates as a motor. The machine is connected as a short shunt motor, with a brush

voltage drop of $2$ volts. The armature resistance is $0\mathrm{.}20,$ the series field winding resistance is $0\mathrm{.}1$ and

the shunt field winding resistance is $200.$

The input voltage is $210$ V and the input current is $50$ amps. The rotational losses are $100$ watts. Determine:

b$)$ The net output power, the power at the motor shaft in watts., Enter the answer in watts, i$.$e$.,1\mathrm{.}8$ KW enter your answer as $1800$