How Do You Find The Magnetic Field Of A Wire?

courses.lumenlearning.comImage: courses.lumenlearning.comFor the case of a long straight wire carrying a current I, the magnetic field lines wrap around the wire. By pointing one's right thumb along the direction of the current, the direction of the magnetic field can by found by curving one's fingers around the wire.

How do you find the direction of the magnetic field?

By pointing one's right thumb along the direction of the current, the direction of the magnetic field can by found by curving one's fingers around the wire. The strength of the magnetic field depends on the current Iin the wire and r, the distance from the wire. The constant m0is the magnetic permiability.

How is the magnetic field of a wire obtained?

The magnetic field of an infinitely long straight wire can be obtained by applying Ampere's law. Ampere's law takes the form. and for a circular path centered on the wire, the magnetic field is everywhere parallel to the path. The summation then becomes just. The constant μ 0 is the permeability of free space.

How is the formula for the magnetic force determined?

The formula for the force depends on the current, the length of the wire, and the magnetic field. The "length vector" of the wire specifies the direction in which the current is flowing.

What is the magnetic field of a current?

For a current I= Amperes and radial distance r= m, the magnetic field is B= Tesla = Gauss. The earth's magnetic fieldis about 0.5 gauss. The permeabilityof free space is Magnetic force between wires

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