A single-phase ideal transformer is connected to a 220V (rms) domestic mains supply. The primary winding has Np=500 turns, while the secondary winding has Ns=50 turns. Answer the following:
a. (i) Calculate the rms secondary voltage.
b. (ii) A purely resistive load of 4Ω is connected across the secondary. Find the rms secondary current.
c. (iii) Determine the rms primary current.
d. (iv) State whether this transformer is step-up or step-down and justify your answer using appropriate numerical evidence.