Electric Machines Mega Quiz 15

(a) imperfect brush contact

(b) field resistance less than the critical resistance

(c) no residual magnetism in the generator

(d) faulty shunt connections tending to reduce the residual magnetism

(a) neutralising residual magnetism

(b) creating residual magnetism by a D.C. source

(c) making the magnetic losses of forces parallel

(d) increasing flux density by adding extra turns of windings on poles

(a) 640 V

(b) 620 V

(c) 600 V

(d) 580 V

(a) brushes

(b) field

(c) armature

(d) load

(a) just ahead of magnetic neutral axis

(b) in magnetic neutral axis

(c) just behind the magnetic neutral axis

none