Q. 47 A single phase 10 kVA, 50 Hz transformer with 1 kV primary winding draws
0.5 A and 55W, at rated voltage and frequency, on no load. A second transformer
has a core with all its linear dimensions
2 times the corresponding dimensions
of the first transformer. The core material and lamination thickness are the same
in both transformer. The primary winding of both the transformers have the save
number of turns. If a rate voltage of 2 kV at 50 Hz is applied to the primary of
the second transformer, then the no load current and power, respectively, are
(A) 0.7 A, 77.8 A
(B) 0.7 A, 155.6W
(C) 1A, 110W
(D) 1A, 220W
Answer:(B)
Explanation:
