A thick current carrying cable of radius R carries current I uniformly distributed across its cross-section. The variation of magnetic field B due to the cable with the distance r from the axis of the cable is represented by [NEET 2021]
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Magnetic field inside the conducting cylindrical cable,
Here, R is the radius of the cylindrical cable, r is the distance from the axis of the cylinder, I is the current carrying in the cylindrical cable.
The graph of magnetic field B with r is a straight line passing through origin.
For a point outside the cylinder,
The graph of magnetic field B with r is a rectangular hyperbola passing through the outer surface of the cylinder.
The variation of the magnetic field B due to the cable with the distance r from the axis of the cylindrical cable is as shown in the figure.
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