Question 246: Magnetism and Matter

Question

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

Accepted Answer

Using Ampere's law at a distance $$r$$ from axis, $$B$$ is same from symmetry.
$$\int {B.dl = {\mu _0}i} $$
i.e., $$B 	imes 2\pi r = {\mu _0}i$$
Here $$i$$ is zero, for $$r < R,$$ whereas $$R$$ is the radius
$$	herefore$$ $$B=0$$

Answer

$${{{\mu _0}} \over {4\pi }},{{2i} \over r}$$ tesla

Answer

zero

Answer

infinite

Answer

$${{2i} \over r}$$ tesla

Magnetism and Matter

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

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