Magnetic field due to a current through a circular loop

 

Magnetic field due to a current through a circular loop

 

To illustrate the magnetic field due to a current through a circular wire, we should take a straight wire and bend it in the form of the circular wire and electric current is passed through them.

As we know that magnetic field produced by the current carrying straight conductor depends on the inversely to the distance  from it.

Similarly , at every points of a current carrying circular loop of the conductor , the concentric circles represents the magnetic field around it becomes larger and larger as we move from the conductor.

A circular wire is made up of large number of the straight wire or conductor. Every arcs of the circles appear like  as a straight line. 

every point on the circular wire is carrying current. And it gives rise to the magnetic field appearing as straight lines at the center of the loop.

By applying right hand thumb rules ,  it is easy  to check the every section of the wire contributes to the magnetic field lines in the same direction within the circular loop.

Right hand thumb rule is used to measure the direction of the  magnetic field due to current carrying circular conductor or wire.

 

Right hand thumb rule  is also called maxwell ‘s corkscrew rule.

if we consider the corkscrew is in the direction of the current , then the direction of the rotation of corkscrew is the direction of the magnetic field.

 

 

As we know that , at a given point in the current carrying conductor , the magnetic field produced is depends on the current passing through it. Therefore, in the circular coil is having n turns, the magnetic field produced is also n times as large as that produced by a single turn.

 

In each circular turn , the current has the same direction.