I_{L} = 150 A

N_{1} = 800 RPM, N_{2} = 1000 RPM

R_{a} = 0.1 Ω

V_{t} = 145 V

I_{a1} = 150 A

E_{g1} = V_{t} + I_{a1}R_{a}

⇒ E_{g1} = 145 + (150)(0.1) = 160 V

E_{y} ∝ N

\(\Rightarrow \frac{{{E_{g1}}}}{{{E_{g2}}}} = \frac{{{N_1}}}{{{N_2}}}\)

\(\Rightarrow \frac{{160}}{{{E_{g2}}}} = \frac{{800}}{{1000}} \Rightarrow {E_{g2}} = 200\;V\)

E_{g2} = V_{t} + I_{a2} R_{a}

⇒ 200 = 145 + I_{a2}(0.1)

⇒ I

_{a2} = 550 A