What's the effect of the thin copper wire in the coil?
The thin copper wire can produce a magnetic field in the coil when it is energized, and the coil is equivalent to an electromagnet at the same time
The thin copper wire in this "electromagnet", that is, for the current provides a channel
Or the carrier, and as the first floor says, converting electric energy into magnetic energy means that the "electromagnet", that is, the role of the coil during energizing, is not the function of the fine copper wire.
