A current $i$ ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is

\infty

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z e r o

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\frac{μ_{0}}{4 π} . \frac{2 i}{r} t e s l a

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\frac{2 i}{r} t e s l a

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Solution

The correct option is A $z e r o$
Magnetic induction inside a thin walled tube is zero.
(According to Ampere's law)

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