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Question

Draw a graph for a thin current carrying hollow conductor for variation of magnetic field with respect to distance R from its axis along the radius.

A
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B
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C
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D
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Solution

The correct option is B
For a thin conductor, the magnetic field inside it at every point is,

Binside=0

Magnetic field outside it at distance r from the axis is,

Boutside=μoI2πr

Boutside1r

Hence, option (B) is the correct answer.

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