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A 100/10, 50 VA double winding transformer is converted to 100/110 V auto transformer. tWhat will be the rating of auto transformer?

A 100/10, 50 VA double winding transformer is converted to 100/110 V auto transformer. tWhat will be the rating of auto transformer? Correct Answer 550 VA

Secondary current of the two-winding transformer at rated voltage supply = 50/10= 5 A Thus, autotransformer will also carry the same rated current in secondary giving the power output as 5*110= 550 VA.

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