a) Save considerable amount of core material b) Reduce short circuit forces c) Reduce leakage flux d) Minimize eddy current loss Ans: (a)
a) Rated for high voltage b) Rated for low voltage c) Carrying very high current d) Carrying very low current Ans: (c)
a) High voltage winding of small trans-formers b) Low voltage winding of small trans-formers c) High voltage winding of large trans-formers d) Low voltage winding of large trans-formers Ans: (c)
a) K b) 1/k c) k2 d) 1/k2 Ans: (c)
a) Low reluctance b) High conductivity c) High reluctance d) Low conductivity Ans: (a)
a) Increases the weight/kVA b) Decreases the weight/kVA c) Reduces iron losses d) Improves insulation Ans: (b)
a) Decreases b) Increases toward saturation c) Becomes zero d) Becomes constant Ans: (b)
a) Have the toughest mechanical shape b) Are easy to wound c) Reduce copper losses d) Reduce iron losses Ans: (a)
a) 4 ppm b) 8 ppm c) 12 ppm d) 20 ppm Ans: (b)
a) Reduce copper material and copper losses b) Reduce iron material and iron losses c) Both (a) and (b) d) Increase mechanical strength of the core Ans: (a)