A household adaptor uses a transformer whose primary is designed for a 120 V, 60 Hz supply and whose secondary is rated at 12 V, 6.0 A. When the adaptor operates at full-load, the efficiency of the transformer is 80 %.
a. (i) Calculate the power actually delivered to the load.
b. (ii) Determine the rms current drawn from the 120 V mains.
c. (iii) Compute the total power loss in the transformer at full-load.
d. (iv) If the copper loss accounts for 60 % of the total loss, find the copper loss in watts.