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The best material for the core of a tran...

The best material for the core of a transformer is

A

stainless stell

B

mild steel

C

hard steel

D

soft iron

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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.

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