The turns ratio of an ideal transformer to transform the impedance of 10 Ω to 90 Ω is. 3 1/9 9 1/3

For an ideal transformer, the efficiency is (a) 0 (b) 100 (c) 50

All values of a transformer are proportional to its __________________ ___________________.

(a) An ideal single-phase two-winding transformer with turns ratio at=N1/N2 is connected with a series impedance Z2 across winding 2. If one wants to replace Z2, with a series impedance Z1 across winding 1 and keep the terminal behavior of the two circuits to be identical, find Z1 in terms of Z2. (b) Would the above result be true if instead of a series impedance there is a shunt impedance? (c) Can one refer a ladder network on the secondary (2) side to the primary (1) side simply by multiplying every impedance byat2 ?