Urgent Answer Required. Electromagnet Design

thanks dear what i get is

B= (Mu*N*I)/Gap

Gap is in meter

I is in ampere

If i made a coil according to following formula r=V/I to get max resistance of coil.

at 12 vdc and I needed is 2 ampere so R=6 Ohm.

i use 24 gauge wire. resistance of 1000 feet is 25 ohm. thats mean at 12 vdc 1000feet of wire draw 0.48 amp.to get more currents and turns i make parallel winding. of 1000 feet and 500 feet. that gives me current of 1.48 Amp.

to find out how much gauss at 1 mm and 38 mm gaps i used B= (Mu*N*I)/Gap

B= (4*pi *10^-7 *1.5 A *1500)/1*10^-3m = 2.8 Tesla and 28000 gauss

at 38 mm it is 0.07 Tesla and 700 gauss.

is i did all calculations ok.

to reduce the dia of coil i should increase length of core because i can not reduce dia of core.

At 1mm gap, it won't be 28000 Gauss. The steel will be close to saturation at about 14000 Gauss.

thanks friend for information. this is calculation against no of turns, current and size of core.

can you tell me which material can give me this gausses ???

If 1000 ft draws 0.48 A then 500 ft will draw 0.96 A, 250 ft will draw 1.92 A and 333-1/3 ft will draw 1.44 A. Why not use one 333 ft length of wire? It would be less bulky and keep the turns closer to the core.

it because, to increase magnetic field by increasing no of turns.