Welding generator will have____________?
Welding generator will have____________?
A. lap winding
B. wave winding
C. delta winding
D. duplex wave winding
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Two generators A and B have 6-poles each. Generator A has wave wound armature while generator B has lap wound armature. The ratio of the induced e.m.f. is generator A and B will be_______________?
Two generators A and B have 6-poles each. Generator A has wave wound armature while generator B has lap wound armature. The ratio of the induced e.m.f. is generator A and B will be_______________?A. 2 : 3
B. 3 : 1
C. 3 : 2
D. 1 : 3In the case of lap winding resultant pitch is____________?
In the case of lap winding resultant pitch is____________?A. multiplication of front and back pitches
B. division of front pitch by back pitch
C. sum of front and back pitches
D. difference of front and back pitchesArmature reaction in a generator results in_____________?
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 polesIn D.C. generators, current to the external circuit from armature is given through_____________?
In D.C. generators, current to the external circuit from armature is given through_____________?A. commutator
B. solid connection
C. slip rings
D. none of aboveTwo generators are running in parallel. One of the generators may run as motor for which of the following reasons ?
Two generators are running in parallel. One of the generators may run as motor for which of the following reasons ?A. The direction of that generator is reversed
B. The speed of that generator is increased
C. The field of that generator is weakened
D. That generator takes large of loadsIf B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by______________?
If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by______________?A. Blv
B. Blv2
C. Bl2v
D. Bl2v2