Question

The output voltage and current of a transformer are determined by the
A. number of turns in the primary and secondary coils.
B. ferromagnetic material of the rings connecting the coils.
C. strength of the DC current in the primary coil.
D. direction of the current in the primary coil.

My guess is A.

Answer 1

The current is dependent on the load across the secondary.
Answer A is the best choice.