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Unit 3: Gravity and Electromagnetism

Quick questions on Transformers and power distribution: WACE Year 12 Physics Unit 3

1short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is applying the equations together?

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Many questions chain the transformer equation with

P=VI

and

P_{\text{loss}}=I^2R

. Work in order: use the turns ratio for the transmission voltage, find the line current from

P=VI

, then the loss from

I^2R

. Keep primary and secondary quantities clearly labelled.

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