When performing the Sumpner's (back-to-back) test on two identical transformers, what is the total voltage across the local circuit of the series-connected secondaries under nominal parallel conditions prior to injecting regulating voltage?

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Physics · Transformers

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Answer 1

Equal to the EMF induced in a single secondary

Answer 2

Square of the EMF induced in each secondary

Answer 3

Double the EMF induced in each secondary

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