Why transformers are designed to just work on AC
Or
What will happen if we pass a DC current through a transformer

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Solution

Dear student

Transformer cannot work in DC because, the primary coil will create a uniform and constant magnetic field, which will fail to induce emf because transformer works on the principle of electromagnetic induction i.e. it will work only with currents that produce varying magnetic field that induces emf (as alternating current does) , but dc produces a constant magnetic field which can not induce emf

With regards

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Why transformers are designed to just work on AC Or What will happen if we pass a DC current through a transformer

Why transformers are designed to just work on AC
Or
What will happen if we pass a DC current through a transformer