Question 1
The reduction of transformer efficiency due to copper loss is caused by
◦
lack cooling.
◦
flux linkage between the primary and secondary windings.
◦
resistance of the transformer windings.
◦
hysteresis.
Question 2
The second harmonic of a 60 Hz signal would be
◦
30 Hz.
◦
120 Hz.
◦
180 Hz.
◦
300 Hz.