Dear Brother,

I am explaining your first one. You have shown the voltage ratio Ep/Es. But I asked turn ratio question in homework. Transformers have three types of ratios. To calculate voltage, current and number of turns. Np/Ns to find the number of turns, i.e. number of primary turn and number of secondary turn. Hope you understand.

I am Bangladeshi. My mother's language is Bengali. My English may have grammatical mistakes. But I will tell you that instead of doing a review like this, it is better to say in the comments section of the lesson part.