Question

The magnetization curve and the field circuit resistance line are shown in figure. The machine is being run as a shunt generator. Assume residual voltage at 1500 rpm is 5 V.





The value of field resistance is

• A. 150 $\Omega$
• B. 100 $\Omega$
• C. 266.67 $\Omega$
• D. 70 $\Omega$

Answer 1

The correct option is A 150 $\Omega$

The slope of field circuit resistance line = field circuit resistance

$=\frac{300}{2}=150\Omega$