Exercises: Motors, Generators, and Transformers

An ideal transformer has primary voltage $V_p = 120\ \text{V}$ and secondary voltage $V_s = 1200\ \text{V}$. The primary current is $I_p = 10\ \text{A}$. Using power conservation ($V_p I_p = V_s I_s$), calculate the secondary current $I_s$ in amperes.