In a level compounded D.C. generator, full load terminal voltage is______________?
(A) negligibly low
(B) equal to no-load terminal voltage
(C) more than no-load terminal voltage
(D) less than no-load terminal voltage
The e.m.f. generated in a D.C. generator is directly proportional to____________?
(A) flux/pole
(B) speed of armature
(C) number of poles
(D) all of the above
In D.C. generators the polarity of the interpoles_____________?
(A) is the same as that of the main pole ahead
(B) is the same as that of the immediately preceding pole
(C) is opposite to that of the main pole ahead
(D) is neutral as these poles do not play part in generating
(D) m.f.
In over compounded generator, full load terminal voltage is______________?
(A) almost zero
(B) less than no load terminal voltage
(C) more than no load terminal voltage
(D) equal to no-load terminal voltage
Permeance is the reciprocal of______________?
(A) flux density
(B) reluctance
(C) ampere-turns
(D) resistance
Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles?
(A) Series generator
(B) Shunt generator
(C) Compound generator
(D) None of the above
Which of the following generator will have negligible terminal voltage while running on no-load?
(A) Series generator
(B) Shunt generator
(C) Compound generator
(D) Separately excited generator
In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when____________?
(A) r.p.m. is more than 300
(B) r.p.m. is less than 300
(C) number of poles is 4
(D) number of poles is 2
D.C. generator generally preferred for charging automobile batteries is______________?
(A) series generator
(B) shunt generator
(C) long shunt compound generator
(D) any of’the above
Armature reaction in a generator results in_____________?
(A) demagnetisation of leading pole tip and magnetisation of trailing pole tip
(B) demagnetisation of trailing pole tip and magnetisation of leading pole tip
(C) damagnetising the center of all poles
(D) magnetising the center of all poles