D.C. generators are installed near the load centres to reduce_____________?
D.C. generators are installed near the load centres to reduce_____________?
A. iron losses
B. line losses
C. sparking
D. corona losses
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In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to
In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to
A. 100% of the previous value
B. 50% of the previous value
C. 25% of the previous value
D. 10% of the previous value
E. none of the aboveIn which of the following applications D.C. series motor is invariably tried?
In which of the following applications D.C. series motor is invariably tried?
A. Starter for a car
B. Drive for a water pump
C. Fan motor
D. Motor operation in A.C. or D.CWhich of the following loss in a D.C. generator is dissipated in the form of heat?
Which of the following loss in a D.C. generator is dissipated in the form of heat?
A. Mechanical loss
B. Core loss
C. Copper loss
D. All of the aboveWhich D.C. motor will be suitable along with flywheel for intermittent light and heavy loads?
Which D.C. motor will be suitable along with flywheel for intermittent light and heavy loads?
A. Series motor
B. Shunt motor
C. Cumulatively compounded motor
D. Differentially compounded motorIn case of D.C. shunt motors the speed is dependent on back e.m.f. only because____________?
In case of D.C. shunt motors the speed is dependent on back e.m.f. only because____________?
A. back e.m.f. is equal to armature drop
B. armature drop is negligible
C. flux is proportional to armature current
D. flux is practically constant in D:C. shunt motorsThe size of poxvirus is_______________?
The size of poxvirus is_______________?A. 20 nm
B. 200 nm
C. 250 nm
D. 300 nm