Question

A current of I ampere flows along an infinitely long straight
thin walled hollow metallic cylinder of radius r. The magnetic
field at any point inside the cylinder at a distance x from the
axis of the cylinder is
(a) [infinity] (b) μ₀I/2πr
(c) μ₀I/2πx
(d) zero

Answer 1

Your answer is d) zero

Hope it helps

Answer 2

ANSWER

⋅dl=μ

0

I

enclosed

Here,

I

enclosed

=0

So, B =0