Answer / msalam_shahin

Though Transformer is an inductive circuit so it can act as
a low pass filter.......

But if the transformer's supply frequency is higher then
the transformer then the paper insulation and di-electric
oil act as capacitor. Then the combined effect of
transformer's inductance and capacitance act as a band pass
filter.....

Answer / shailendra

bandpass of a x-mer is 50 hz.

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