To calculate the magnetic field at a point near a long wire, you can use the formula:
B = (μ₀ * I) / (2 * π * r)
Where B is the magnetic field, μ₀ is the permeability of free space, I is the current in the wire, and r is the distance from the wire to the point of interest.
Magnetic field is typically measured in units of Tesla (T) or Gauss (G). 1 T is equal to 10,000 G.
The magnetic field is inversely proportional to the distance from the wire. This means that as the distance increases, the magnetic field decreases.
No, this formula only calculates the magnitude of the magnetic field. The direction of the magnetic field can be determined using the right-hand rule, where the thumb points in the direction of the current flow and the fingers curl in the direction of the magnetic field.
No, this formula can also be used to calculate the magnetic field at a point near a coil or a solenoid, as long as the current is constant and the wire is long enough compared to the distance from the point of interest.