### Magnetic Field of straight Current – Carrying Wire Calculator

Calculate the strength of the magnetic field produced at a distance using the Straight Current-Carrying Wire Magnetic Field Calculator.

Maxwell’s equation states that a flowing electric current always produces a magnetic field. Current flowing through a straight wire refers to the magnetic field lines coming from concentric circles and the magnetic field strength depends on the distance between the wire and the current flowing through it.

We usually use the right-hand rule of thumb or the cross product to find the magnetic field around the wire.

### Magnetic Field of straight Current – Carrying Wire:

Magnetic field produced at a distance B_{(T)} in Tesla is equal to the permeability of free space that has a constant value μ_{0(mA)} in meter per Ampere and multiply the current I_{(A)} in Ampere and divided by the two and multiply the π value in 3.14 and multiply the distance from the wire d_{(m)} in meter.Hence the magnetic field of straight current carrying wire can be written as

B_{(T)}=μ_{0(mA)} *I_{(A)} /( 2* π *d_{(m)})

Where

μ_{0} = is the permeability of free space that has a constant value μ_{0 }=4 π *10^{-7} Tm/A

B= is the strength of the magnetic field produced at a distance

D=is the distance of the wire

I= is the current

### Example:1

If 120A of current flowing through a straight long wire and the distance from the wire 80m.Find the strength of the magnetic field around the wire?

### Answer:

Given that

Current I =120A

Distance from the wire d =80m

The magnetic field around the wire is

B=μ_{0} *I /( 2* π *d)

B=[4 π *10^{-7}*120 ) / (2* π*80)

=0.0000003T

### Example:2

If 50A of current flowing through a straight long wire and the distance from the wire 6m.Find the strength of the magnetic field around the wire?

### Answer:

Given that

Current I =50A

Distance from the wire d =6m

The magnetic field around the wire is

B=μ_{0} *I /( 2* π *d)

B=[4 π *10^{-7}*50) / (2* π*6)

=0.0000001666666T