How to determine the number of turns needed to generate specific magnetic field?
my condition is that the area of the magnet field strength must be able to sense a magnet material which is placed 4meters away from it. And voltage applied is 2.6v. Is there any formula?
The question is not very clear. Is it a single loop whose area is to be determined or whether the area is given and no. of turns to be calculated?
Anyway, I am giving here the formulae.
If, V is given, then current can be calculated if R is given.
Use this online calculator to solve your question, if you have necessary data.
If any clarifications required please post as comment to this post.