DROBNJAK:
I guess it is a perenial question.I need to wind some coils. Am I going to produce stronger magnetic field if I use lots of thinnest wire where many strands in the same section carry small current many times over. Or am I going to get a stronger magnetic field if I just use one single thick wire that can carry a huge amperage?
In order for anyone to help you, we need to know what you want.
Are you building an electromagnet? A transformer? A choke? DC? AC? If AC, what frequency?
If electromagnet or transformer, what voltage?
There are LOTS of variables (wire resistance, wire gauge, current, volts-per-turn, core material depending on frequency and lots more).
Can't help you with zero information.