Problem $3$: A shunt connected DC motor with negligible rotational losses has the magnetization

curve shown below where M$=75($V$)/($A$)$ and $\backslash$omega $\_($m$)=116$ra$($d$)/($sec$).$

Maanetization Curve

The supplied voltage, V$\_($T$),$ is $200$V$,$R$\_($A$)=4\backslash$Omega and R$\_($F$)=50\backslash$Omega $.$

a$=0\backslash$Omega $?(10$ points$)$

bR$\_($adj$.).$ When you get back, you notice that the

output power is now $1250$ W with the same load torque connected. What is the new

value for R$\_($adj $)$ assuming your nemesis only changed it a small amout? $(10$ points$)$

c points