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Will the tranformers work on pulsating dc ? as there occurs a change in magnitude of the flux produced
You can take that "pulsating ac" and re-express it as the sum of a pure dc (just the average current) and an ac (the difference from the average). A transformer in its intended operating range is close to being a linear device, so its output is just what it would give for the ac part alone. If the dc part is too big, then the transformer core will saturate and the output will be reduced and distorted