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?

Asked Yadu

Answer:

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.