Transformer » Exercise - 18. If the primary power of an ideal transformer having a 2:1 voltage ratio is 100 W, the secondary power is : (a) 50 W (b) 75 W (c) 100 W (d) 200 W
Transformer » Exercise - 112. The main purpose of performing open-circuit test on a transformer is to measure its : (a) Cu loss (b) core loss (c) total loss (d) insulation resistance
Transformer » Exercise - 115. The ordinary efficiency of a given transformer is maximum when : (a) it runs at half full-load (b) it runs at full-load (c) its Cu loss equals iron loss (d) it runs slightly overload
Transformer » Exercise - 13. In an ideal transformer : (a) windings have no resistance (b) core has no losses (c) core has infinite permeability (d) all of the above