How will you show that a current carrying conductor has a magnetic field arround it? How will you find its magnitude and direction at a particular place ?
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It can be shown by using galvanometre.
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First for the conductor we have to know the direction of flow of electrons or the direction of the current flow. After knowing that we can use the right hand thumb rule which will give us the direction of the magnetic field around a current carrying conductor.
To find the magnitude we use the formulae of F=Bil where F is the force experienced by the wire i is the current and l is the length of the wire with B is the magnetic field. To find the direction of the magnetic field we again use the right hand thumb rule and point the right hand in the direction of the current and the direction in which the fingers curl will be the direction of magnetic field.
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