Which of the following loss in a transformer is zero even at full load ____________?
Which of the following loss in a transformer is zero even at full load ____________?
A. Core loss
B. Friction loss
C. Eddy current loss
D. Hysteresis loss
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Material used for construction of transformer core is usually___________________?
Material used for construction of transformer core is usually___________________?
A. wood
B. copper
C. aluminium
D. silicon steelThe transformer lamination’s are insulated from each other by____________?
The transformer lamination’s are insulated from each other by____________?
A. mica strip
B. thin coat of varnish
C. paper
D. any of the aboveAuto-transformer makes effective saving on copper and copper losses, when its transformation ratio is_________________?
Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is_________________?
A. approximately equal to one
B. less than one
C. great than one
D. none of the aboveThe noise produced by a transformer is termed as_______________________?
The noise produced by a transformer is termed as_______________________?
A. zoom
B. hum
C. ringing
D. buzzTwo transformers operating in parallel will share the load depending upon their____________?
Two transformers operating in parallel will the load depending upon their____________?
A. leakage reactance
B. per unit impedance
C. efficiencies
D. ratingsDistribution transformers are generally designed for maximum efficiency around________________?
Distribution transformers are generally designed for maximum efficiency around________________?
A. 90% load
B. zero load
C. 25% load
D. 50% load