A 3-phase transformer has 420 and 36 turns on the primary and secondar – McqOptions

MCQOPTIONS

1.	A 3-phase transformer has 420 and 36 turns on the primary and secondary windings respectively. The supply voltage is 3300 V. The secondary line voltage on no-load when the windings are connected in star-delta is nearly
A.	22260 V
B.	1908 V
C.	164 V
D.	490 V
Answer» D. 490 V

Discussion

No Comment Found

Related MCQs

For transformer given, turns ratio is equal to a, what will be the impedance of primary with respect to secondary?
Which of the following is the wrong expression?
Which of the following is the expression for emf induced in primary with voltage applied to primary of an ideal transformer?
Ideal transformer core has permeability equal to _____a) Zerob) Non-zero finitec) Negatived) Infinite 8.Turns ratio of the transformer is directly proportional to ____________
A 10 kVA, 200 V/2000 V transformer is feeding a load resistance of 2.5 p.u. based on the rating of HV side. The actual value of load resistance referred to LV side?
A transformer core is wound with a coil carrying alternating current at a frequency of 50 Hz. The hysteresis loop has an area of 60,000 units when the axes are drawn in units of 10-4 Wb m-2 and 102 Am-1. If the magnetization is uniform throughout the core volume of 0.01 m3, the power loss due to hysteresis will be
At low frequencies the material used for the transformer core is
Over fluxing protection is normally recommended for
As compared to Δ-Δ bank, the capacity of the V-V bank of transformers is ______ percent.
Laminated insulation, coated with varnish, is a staple adoption in transformer assemblage in order to