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Question:

GCSE Physics Transformers - why do they have an iron core?

Why is it important that transformers have an iron core and not say a steel one ?thanks

Answer:

even inspite of the undeniable fact that iron conducts electricity, this conductivity isn't any help in iron's utility as a transformer center. in actuality, the conductivity is a concern that enables cutting-edge loops in the floor layers of the transformer center to circulate, effectively protecting the majority fabric from the changing magnetic container the middle is meant to accentuate and direct. those cores are laminated to interrupt up those cutting-edge loops so they do no longer interfere lots with the middle's operation. Ferrite ceramic cores paintings very resembling iron cores yet habit electricity poorly or not often in any respect. as a result they are used for transformer cores meant to function at greater frequencies the place the laminations in iron cores would want to be too skinny to be sensible.
Transformers Physics Gcse
iron is an electromagnet. steel is a material used to make permanent magnet. The 'hysteresis loop of iron is too small.but that of steel is too large. that means the energy discipation created by iron is very less while that by steel is very high. So iron is used instead of steel !

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