A. convert AC armature current in to DC
B.  increase efficiency
C. collecting of current
D. reduce losses

A. AC and DC
B. AC
C. DC
D. None

A. 2 and 1
B. 2 and 2
C.  4 and 2
D. 4 ang 1

A. hysteresis loss
B. total iron losses
C. copper loss
D. eddy current loss

A. Hysteresis losses
B. Eddy current losses
C.  Copper losses
D. Both a nd b

A. f³
B. f^1.6
C. f
D. f²

A.  Flux density
B. Thickness
C. Frequency
D. All of them

A. Armature control
B. Ward-Leonard control
C. Multiple voltage control
D. Armature resistance control

A. Residual magnetism of the generator
B. Armature resistance
C. Field resistance
D. None of them

A. Copper loss
B. both 1 and 2
C. bwindage and friction loss
D. core loss only