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

Real transformers are not quite ideal, and WACE expects you to name the loss mechanisms and how engineers reduce them. Eddy currents are loops of current induced in the solid iron core by the changing flux; they dissipate energy as heat, so cores are laminated (built from thin insulated sheets) to break up these loops. Resistive heating in the copper windings is reduced by using thick, low-resistance wire. Hysteresis loss, the energy used repeatedly re-magnetising the core, is reduced by choosing a soft magnetic material that magnetises and demagnetises easily.

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.