1. For the star-star connection of three phase transformer, the phase angle between the phase voltages and line voltages on both primary and secondary side is : (a) 0 degree (b) 30 degree (c) 60 degree (d) 120 degree
Answer
Answer : (b)
Explanation
Explanation : No answer description available for this question. Let us discuss.
5. If K is the transformation ratio, then the secondary phase voltage of delta-delta connected three phase transformer will be :
(a) 1 / K times of the primary phase voltage (b) Equal to the primary phase voltage (c) 1 / K ∧ 2 times of the primary phase voltage (d) K times the primary phase voltage
Answer
Answer : (d)
Explanation
Explanation : No answer description available for this question. Let us discuss.
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 - 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
Synchros » Exercise - 12. Regarding voltages induced in the three stator windings of a synchro, which statement is false ? (a) they depend on rotor position (b) they are in phase (c) they differ in magnitude (d) they are poly-phase voltages