Magnetic Effect of Electric Current-Part 2

Hi, as we already studied the magnetic effect of electric current; the many question arises that who discovered it? What is Oersted law and so many others?  Beyond the concern with class 10 magnetic effect of electric current notes we further take our discussion to depth level.

When I think about Oersted law; it is so common thing that if two bodies are experiencing the force from each other it surely means that there must be a some strong connection or similarities or even strong dissimilarities between forces.
The Oersted law gives the idea about force acting on conductor carrying current when it get placed in external magnetic field.

Before I lead to the Oersted law. I like to ask you don’t you see the answer hidden in question itself.

I think yes. Still let us discuss something about simple and beautiful answer to this interesting question.

I have a simple imagination.

Let we consider a current carrying conductor; which is placed in uniform magnetic field. Then we observe that the conductor is experiencing a force. Here is the magic comes.

Why it should happen? Why conductor should acted by a force in magnetic field. The magnetic force is acting on conductor but to counter it there must be a force due to conductor. Which must be similar to magnetic force. Hence it is clear that current produces the magnetic field in conductor and which counter the force due to magnetic field.

This is the basic idea of Oersted law.

The magnetism produced by the flow of an electric current. This idea was studies by Danish scientist named Oersted in year 1820. 

There he studied that if an electric current is sent through a conductor which is placed in uniform magnetic field. The conductor experiences a force due to the field. This is what we studied in Magnetic Effect of Electric Current Class 10 Notes.

We can define the magnetic effect of electric current in simple way.

The phenomenon of production of magnetism due to the flow of electric current is called as magnetic effect of electric current.

          The above observation can be diagrammatically put as;

    Say,      

               ‘L’  be the length of conductor

               ‘I’  be the value of current

               ‘B ‘  be the magnetic induction

According to Oersted the force is given by;   

In scalar form; it can be written as;

  Where angle 'Ɵ' 

is in between the length and direction of magnetic induction(B).

          Now; a question must arise that why conductor experience the force when get placed in magnetic field of induction (B). 

This clearly means that to relate with the external magnetic field there must be some another magnetic field to be in part for the force and that field is around the conductor which is generated by flow of electric current.       

          This concept of production of magnetic field around a conductor due to flow of electric current known as magnetic effect of electric current.

          

The value of force is maximum for angle
 Ɵ=90 °

                     F=ILBSin90 °= ILB                 

 We can discuss some more FAQ on this topic

Ø  What is Oersted law? When it get discovered?

Ø  What is the use of the magnetic effect of a current?

Ø  Why does an electric current produce magnetic effect?

Ø  How do electric currents produce magnetic fields?

Ø  Why does a changing magnetic field induce a current?

Ø  What is the cause of electric and magnetic forces?