In a $120$ V compound generator, the resistances of armature, shunt and series windings are $0\mathrm{.}06$ ohm, $25$ ohm, and $0\mathrm{.}04$ ohm respectively. The load current is $100$ A at $120$ V$.$ Find the induced emf and the armature current when the machine is connected as $($i$)$ long shunt and as short shunt. How will the ampere$-$turns of the series eld be changed $($in $\%)$ in a long shunt generator if a divertor of $0\mathrm{.}1$ ohm be connected in parallel with the series winding?