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

Soft iron

Rolled steel

Copper alloy

Cold rolled grain oriented

Ratio test

Impulse test

Short circuit test

Open circuit test

To reduce the constant losses

To reduce electric interference

To increase the quality of sound

To increase the efficiency of receivers