Transformer » Exercise - 16. A transformer having 1000 primary turns is connected to a 250-V a.c. supply. For a secondary voltage of 400 V, the number of secondary turns should be : (a) 1600 (b) 250 (c) 400 (d) 1250
Transformer » Exercise - 12. Which of the following is not a basic element of a transformer ? (a) core (b) primary winding (c) secondary winding (d) mutual flux
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
Transformer » Exercise - 17. The primary and secondary induced e.m.fs. E1 and E2 in a two-winding transformer are always : (a) equal in magnitude (b) antiphase with each other (c) in-phase with each other (d) determined by load on transformer secondary
Transformer » Exercise - 1 1. A transformer transforms : (a) frequency (b) voltage (c) current (d) voltage and current