Answer the following questions related to an ideal transformer:
a. (i) List the two principal assumptions that make a practical transformer behave ideally.
b. (ii) Starting from the principle of conservation of energy, derive the relationship VpVs=NpNs and IpIs=NsNp for an ideal transformer.
c. (iii) Using your result in part (ii), explain qualitatively why stepping up the voltage necessarily steps down the current in an ideal transformer.