Draw the pattern of magnetic field lines produced around a current
carrying straight conductor passing perpendicularly through a horizontal
cardboard. State and apply right-hand thumb rule to mark the direction
of the field lines. How will the strength of the magnetic field change when
the point where magnetic field is to be determined is moved away from
the straight conductor ? Give reason to justify your answer.
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the magnetic field lines due to a straight wire carrying current. Magnetic field lines form in concentric circles around a cylindrical current carrying conductor. The direction of such magnetic field can be determined by using the "Right hand rule". It has been pictorially shown in the figure.
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