Permeance is the reciprocal of______________?
Permeance is the reciprocal of______________?
A. flux density
B. reluctance
C. ampere-turns
D. resistance
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Following energized winding of a D.C. machine should not be opened as it would produce high inductive voltage which may be dangerous to personnel and may cause its own insulation failure.
Following energized winding of a D.C. machine should not be opened as it would produce high inductive voltage which may be dangerous to personnel and may cause its own insulation failure.A. Series field
B. Compensating field
C. Inter pole field
D. Shunt fieldWhich of the following generating machine will offer constant voltage on all loads?
Which of the following generating machine will offer constant voltage on all loads?A. Self-excited generator
B. Separately excited generator
C. Level compounded generator
D. All of the aboveLap winding is composed of_____________?
Lap winding is composed of_____________?A. any even number of conductors
B. any odd number of conductors
C. that even number which is exact multiple of poles + 2
D. that even number which is exact multiple of polesThe purpose of providing dummy coils in a generator is__________________?
The purpose of providing dummy coils in a generator is__________________?A. to reduce eddy current losses
B. to enhance flux density
C. to amplify voltage
D. to provide mechanical balance for the rotorIn a D.C. generator the critical resistance refers to the resistance of_____________?
In a D.C. generator the critical resistance refers to the resistance of_____________?A. brushes
B. field
C. armature
D. loadIn a level compounded D.C. generator, full load terminal voltage is______________?
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