(a)[3]
Calculate the current in the primary coil from this information.
(b)[2]
Calculate the ratio of turns on the primary coil to turns on the secondary coil for the transformer.
Physics 0625 · IGCSE · Electromagnetic effects
Electromagnetic effects — practice question
In a $100\%$ efficient transformer, the voltage across the primary coil is $220\,\text{V}$, while the voltage across the secondary coil is $12\,\text{V}$.