A 100VA single-phase transformer inside a refrigerator has 100 turns in its primary coil and 20 turns in its secondary. A 120v ac source is connected to the primary. a. Is this an example of a step-up or a step-down transformer? b. What is the secondary voltage? c. Indicate why a transformer is needed in a fridge – why two different voltages are needed in a fridge, and indicate a part of the fridge that is powered by the secondary voltage of this transformer. d. Ifa 202 load is connected to the secondary, what percentage of its rated power will the transformer supply? e. If the primary is reduced to 90 turns, what will the secondary voltage be with the same 120v primary source?

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Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.