Transformer Phasor Diagram

We laminate transformer core to reduce

I. Core flux – Depends on applied voltage
II. Leakage flux – Depends on winding current
Which of the above two are matched correctly?

Energizing the transformer primary from a triangular wave voltage source makes the output voltage as

A transformer has sometimes more than two ratings depending upon the use of

If a transformer is fed from a 220V and dc supply rather than a 1-phase ac supply, then the transformer will

In case of a power transformer, the no load current in terms of rated correct is

Considering a transformer at no load is excited at rated voltage.
A small recognizable gap is made in the yoke of the limbs. With this altercation, the transformer core flux

A 400/200V transformer has total resistance of 0.04 p.u on its L.V side. This resistance when referred to H.V side would be

I. Voltages – Direct ratio
II. Current – Inverse ratio
III. Impedance – Direct ratio squared
Iv. Power – Inverse ratio squared
Mark the statements which are marked correct for an ideal transformer.

In an ideal transformer, the impedance can be transformed from one side to the other

Transformer action requires a

In an oil filled transformer, the application of oil is for

In a single phase transformer,the no-load current lags the applied voltage by

Energising the transformer primary from a triangular wave flux makes the output voltage as

The non linear magnetization curve of a practical transformer will introduce

The output voltage seen at the CRO connected at the secondary terminals is square wave. Then the flux density used for energizing the primary is