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  • With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a

With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a current carrying conductor?

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Solution:

Labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current carrying straight long conducting wire:

Concentric magnetic field lines will be produced when current passes through the conductor. As we move away from the wire, the strength of magnetic field keeps on decreasing.

We can use right hand thumb rule to find the direction of magnetic field.
It states that if a current carrying conductor is held by our right hand (keeping the thumb straight) and if the direction of electric current is in the direction of thumb, then the direction of magnetic field will be given by the direction of wrapping of other fingers. This is shown as follows:

 

 

 

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