To minimize eddy current losses

To increase the hysterisis losses

To maximize eddy current losses

To increase core saturation losses

Ring core transformer

Ferrite core transformer

Silicon steel core transformer

Grain oriented core transformer

Back emf increases

Eddy current decreases

Magnetic flux increases

Energy loss takes place

To minimize the burden

To maintain constant output

To prevent high static shield

To minimize the error in reading

Hysteresis loss only

Eddy current loss only

Copper loss

Core loss