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Help with Transformer Lab Question - Electrical Power Engineering

Hi, I did a lab experiment and I can't work out how to calculate the final question.

The Q is:

3 resistors in parallel of values 950ohms, 1950ohms and 3770ohms are used to load the secondary side of the 230V, 100VA transformer.

Running this in the lab i got values of 41.15mA for off load primary current, 484mA for full-load primary current and 420mA for full load secondary current.

How do I use these results to calculate the load resistance required for the transformer that would draw a rated current of 0.435A from the secondary?

Thanks

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