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A long straight cylindrical hollow pipe ...

A long straight cylindrical hollow pipe has inner and outer radii 1 cm and 2 cm respectively. It carries a current 100 A. Calculate the magnetic field at distance (a) 0.5 cm, (b) 1.5 cm and (c) 4 cm from the axis of pipe.

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The correct Answer is:
[(a) 0 (b) `5.56 xx 10^(-4)T` (c) `5 xx 10^(-4)T`]
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