A transformer is being built to the voltage produced. Which data are collected to investigate whether the transformer can achieve to the goal?
A) the ratio of the number of turns in the primary and secondary coils
B) only the number of turns in the secondary coil and the magnetic field of the core
C) the ratio of the number of turns in primary and secondary coils and the magnetic field of the core
D) only the number of turns in the primary coil and the magnetic field of the core