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A magnetic field is a region in space where magnetic forces are present. It is created by moving electric charges, such as electrons, and can be felt by other moving charges.
A magnetic field is created by the flow of electric current through a straight wire. The direction of the magnetic field can be determined by the right-hand rule, where the thumb points in the direction of the current and the curled fingers point in the direction of the magnetic field.
The strength of the magnetic field decreases with distance from a straight wire. It follows an inverse square law, meaning that the strength decreases by a factor of four as the distance is doubled.
The strength of the magnetic field produced by a straight wire is affected by the current flowing through the wire, the distance from the wire, and the material the wire is made of. A higher current, closer distance, and more conductive material will result in a stronger magnetic field.
The direction of the magnetic field at different points around a straight wire can be determined using the right-hand rule. By placing your thumb in the direction of the current and curling your fingers, the direction of the magnetic field will be perpendicular to your fingers.
