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No-load current in a transformer?
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No-load current in a transformer
lags behind the voltage by about 75°.
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The no load current in a transformer lags behind the applied voltage by an angle of about?
Even at no-load, a transformer draws current from the mains. Why?
No-load current of a transformer has?
In an actual transformer the iron loss remains practically constant from no load to full load because?
A no-load test is performed on a transformer to determine?
In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of?
The inrush current of a transformer at no load is maximum if the supply voltage is switched on
For a transformer, operating at constant load current, maximum efficiency will occur at?
In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are?
in open circuit or no load test of transformer which side is open circuited?
in open circuit or no load test of transformer which side is low voltage side and which side is high voltage side?
The full-load copper loss of a transformer is 1600 W At half-load, the copper loss will be?
An ideal transformer will have maximum efficiency at a load such that?
The maximum load that a power transformer can carry is limited by its?
The magnetising current of a transformer is usually small because it has?
When secondary of a current transformer is open-circuited its iron core will be?
The secondary of a current transformer is always short-circuited under operating conditions because it?
The no-load current drawn by transformer is usually what per cent of the full-load current ?
The purpose of providing an iron core in a transformer is to?
Which winding in a transformer has more number of turns ?
In a transformer routine efficiency depends upon?
The purpose of providing iron core in a step-up transformer is?
In a transformer the tappings are generally provided on?
The thickness of laminations used in a transformer is usually?
The function of conservator in a transformer is?
The main reason for generation of harmonics in a transformer could be?
The leakage flux in a transformer depends upon?
Noise level test in a transformer is a?
The value of flux involved in the e.m.f. equation of a transformer is ?
The function of breather in a transformer is?
In a power or distribution transformer about 10 percent end turns are heavily insulated?
In a transformer the resistance between its primary and secondary should be?
If a transformer is continuously operated the maximum temperature rise will occur in?
The hum in a transformer is mainly attributed to?
The path of magnetic flux in a transformer should have?
No load current in a transformer:
In case of a power transformer, the no load current in terms of rated current is
A single-phase transformer has no-load loss of 64 W, as obtained from an open circuit test. When a short-circuit
In the transformer which winding has got more cross-sectional area?
Transformer breaths in when?
The use of higher flux density in the transformer design?
The chemical used in breather for transformer should have the quality of?
The transformer ratings are usually expressed in terms of?
The core used in high frequency transformer is usually?
Which type of winding is used in 3 phase shell-type transformer ?
Reduction in core losses and increase in permeability are obtained with transformer employing?
what do not change in transformer?
In a single-phase transformer, the magnetizing current is
How eddy current is produced in a transformer?
State why a transformer always have an efficiency of more than 90%.