Transformer breaths in when_______________?
Transformer breaths in when_______________?
A. load on it increases
B. load on it decreases
C. load remains constant
D. none of the above
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Greater the secondary leakage flux____________?
Greater the secondary leakage flux____________?
A. less will be the secondary induced e.m.f.
B. less will be the primary induced e.m.f.
C. less will be the primary terminal voltage
D. none of the aboveWhich type of winding is used in 3 phase shell-type transformer?
Which type of winding is used in 3 phase shell-type transformer?
A. Circular type
B. Sandwich type
C. Cylindrical type
D. Rectangular typeIn a transformer the resistance between its primary and secondary is____________?
In a transformer the resistance between its primary and secondary is____________?
A. zero
B. 1 ohm
C. 1000 ohms
D. infiniteAn ideal transformer has infinite values of primary and secondary inductances. The statement is______________?
An ideal transformer has infinite values of primary and secondary inductances. The statement is______________?
A. true
B. falseAn ideal transformer will have maximum efficiency at a load such that?
An ideal transformer will have maximum efficiency at a load such that?
A. copper loss = iron loss
B. copper loss iron loss
D. none of the aboveThe voltage transformation ratio of a transformer is equal to the ratio of_______________?
The voltage transformation ratio of a transformer is equal to the ratio of_______________?
A. primary turns to secondary turns
B. secondary current to primary current
C. secondary induced e.m.f. to primary induced e.m.f
D. secondary terminal voltage to primary applied voltage