First here it is with 25 gauge, I am winding about 15 to 100 turns I have to complete up to this, then it will develop enough with a magnetic so magnetic force, then with the help of probe, inserting the probe inside, then we can measure the strength field strength like
আমরা প্রথমে 25 গেজ তার, 15 থেকে 100 বার পাক দেবো ।