The figure below shows an induction coil used to step-up voltage.
![Physcf4et1p2q17b](https://www.easyelimu.com/images/form_4_past_papers/Form4_EndTerm1_2021/Physc_Paper_1_2_3/Physcf4et1p2q17b.JPG)
- State the difference between the induction coil and a step-up transformer.
- Explain how voltage is stepped up by the induction coil.
- The voltage is stepped up from 12V to 15kV. Determine the ratio of the secondary to primary coils in the induction coil.