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A 100 VA, 120/12 V transformer is to be connected so as to form a step-up transformer. A Primary voltage of 120 V is applied to the transformer. What is the secondary voltage of the transformer?

A 100 VA, 120/12 V transformer is to be connected so as to form a step-up transformer. A Primary voltage of 120 V is applied to the transformer. What is the secondary voltage of the transformer? Correct Answer 132 V

To get the step-up transformer, we have to connect the given two winding transformer as Auto transformer in series additive polarity.

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Given, transformer voltage 120/12 V

The primary voltage of required step-up transformer = 120 V

The connection of the required transformer is shown below.

VHV = 120 + 12 = 132 V

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