clear
//
//given
//the external characteristic of the generator,the combined armature and series field resistance is given by ra+rs
r=0.375 //ra+rs
//case a
i=150
//-0.375+0.4=0.025 the voltage drop
vab=0.025*150
printf("\n when i=150 the voltage drop between points a and b is= %0.1f  V",vab)
vab=0.025*45
printf("\n when i=45 the voltage drop between points a and b is= %0.1f  V",vab)