A. frequency
B. area of the core
C. flux density of the core material
D. A. and B. both
Transformers
Transformers
A. Step-up transformer
B. Step-down transformer
C. Potential transformer
D. Current transformer
A. to provide oxygen inside the tank
B. to cool the coils during reduced load
C. to cool the transformer oil
D. to arrest flow of moisture when outside air enters the transformer
A. about the same
B. much smaller
C. much higher
D. somewhat smaller
E. none of the above
A. low,low
B. high,high
C. low,high
D. high,low
A. less than 15 A
B. more than 15 A
C. 15 A
D. none of the above
A. same efficiency
B. same polarity
C. same kVA rating
D. same number of turns on the secondary side.
A. unity
B. lagging
C. leading
D. zero
A. approximately equal to one
B. less than one
C. great than one
D. none of the above
A. hysteresis losses
B. copper losses
C. core losses
D. eddy current losses
