Basically, magnetic field refers to a certain
area surrounding a magnet which leads to attract other magnetic material like
iron, nickel etc. This field is an imaginary field and magnetic lines of force
are implemented to get a vivid concept about the pattern of that magnetic
field.
The word intensity means the amount of
energy congested in a specific area. So, magnetic field intensity refers to the
strength of the magnetic field at a certain point. We know that, the strength
of magnetic field depends on the number of magnetic lines of force associated
with the magnet. So, more number of magnetic lines of force congested in a
specific area automatically increases the magnetic field intensity of that
area.
Consider you have a solenoid with few turns
of wires. Whenever a voltage source is connected with it then it acts like a
magnet and starts attracting other magnetic materials. By calculating the
magnetic field intensity, we can easily characterize the strength of the
external field, that is the magnetic field due to the source.
The measuring unit of magnetic field
intensity is Tesla (T). To develop one Tesla field intensity, a force of one
Newton must act on a wire of length one meter, which is carrying one ampere of
current.
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