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  4. The graph showing the variation of the magnetic field strength (B) with distance (r) from a long current carrying conductor is

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Q. The graph showing the variation of the magnetic field strength $(B)$ with distance $(r)$ from a long current carrying conductor is

COMEDKCOMEDK 2015Moving Charges and Magnetism

Solution:

The magnetic field strength $(B)$ at the distance $(r)$ from· a long current carrying conductor is given by
$B = \frac{\mu_0}{2 \pi} \frac{I}{r} $
For given current, $Br$ = constant
This represents a rectangular hyperbola