A transformer is to be employed to give power for a computer disk drive which requires 5.4 V (rms) rather than the 120 V (rms) from the wall outlet. The number of turns in the primary is around 395 and it delivers 500 mA (the secondary current) at an output voltage of around 5.4 V (rms).
(i) Must the transformer encompass more turns in the secondary compared to the primary, or fewer turns?
(ii) Determine the current in the primary.
(iii) Determine the number of turns in the secondary.