The best material for the core of a transformer is
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The core of a transformer undergoes cycles of magnetisation again and again. During each cycle of magnetisation, energy numerically equal to the area of the hysteresis loop is spent per unit volume of the core. Therefore, for high efficiency of transformer the energy loss will be lesser, if the hysteresis loop is of lesser area i.e., narrow . Since, soft iron has narrow hysteresis loop, it should be used as the core of a transformer .
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Mention the two characteristic properties of the material suitable for making core of a transformer.
A transformer is working on 220V.50 Hz a.c. supply. The iron core of the transformer has a mass of 8.4 kg.. From the plot of B-H loop for the core, it is found that area of hte loop is 480 J m^-3 . If the density of iron is 7,500 kgm^-3 , find the loss of energy in the core of transformer in 1 hour.
Why soft iron is used in making the core of a transformer ?
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