If a long hollow copper pipe carries a current, then produced magnetic field will be

Question

If a long hollow copper pipe carries a current, then produced magnetic field will be (A) both inside and outside the pipe (B) outside the pipe only (C) inside the pipe only (D) neither inside nor outside the pipe

Tardigrade Admin · Accepted Answer

Use Ampère's law oint B . d l=μ0 i text enclosed . text Outside: i text enclosed ≠ 0 (some value) ⇒ B ≠ 0 text Inside =i text enclosed =0 ⇒ B=0 .

Q. If a long hollow copper pipe carries a current, then produced magnetic field will be

both inside and outside the pipe

outside the pipe only

inside the pipe only

neither inside nor outside the pipe

Use Ampère's law
$\oint B . d l = μ_{0} i_{enclosed}$ .
$Outside : i_{enclosed} \neq = 0$ (some value)
$\Rightarrow B \neq = 0$
$Inside = i_{enclosed} = 0$
$\Rightarrow B = 0.$

Q. If a long hollow copper pipe carries a current, then produced magnetic field will be

both inside and outside the pipe

outside the pipe only

inside the pipe only

neither inside nor outside the pipe

Use Ampère's law ∮B.dl=μ0​ienclosed ​. Outside :ienclosed ​=0 (some value) ⇒B=0 Inside =ienclosed ​=0 ⇒B=0.

Use Ampère's law
$\oint B . d l = μ_{0} i_{enclosed}$ .
$Outside : i_{enclosed} \neq = 0$ (some value)
$\Rightarrow B \neq = 0$
$Inside = i_{enclosed} = 0$
$\Rightarrow B = 0.$