Transformer Equations (OCR GCSE Physics A (Gateway Science Suite)): Quizzes

$\frac{\text{pd of primary}}{\text{pd of secondary}}$

Power in each coil is the same

$V_p \times I_p = V_s \times I_s$

25,000 V

400,000 V

16

Reduced by factor of 16

$\text{power} = \text{pd} \times \text{current}$

$\text{power} = \text{current}^2 \times \text{resistance}$

256

Less energy dissipated as heat

Energy transferred more efficiently