Step up, step down, or 1:1, it makes no difference. Change load --> secondary current change --> IZ voltage change by transformer secondary impedance --> change in secondary output voltage.Why in a step down trasformer changing the load resistance changes the output voltage of transformer which should remains constant........?
You're premise is incorrect -- who says it should remain constant? A xfmr is typically not regulated....the output voltage of transformer which should remains constant........?
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