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  • If a long hollow copper cylinder carries a direct current, the magnetic field associated with the current will beOption: 1 Only inside the pipe<

If a long hollow copper cylinder carries a direct current, the magnetic field associated with the current will be

Option: 1

Only inside the pipe


Option: 2

Only outside the pipe


Option: 3

Neither inside nor outside the pipe


Option: 4

Both inside & outside the pipe


Answers (1)

best_answer

Because for inside the pipe ienclosed=0

From Ampere's law,

\\ \therefore \oint \vec{B}.\vec{dl}={\mu_oI_{enclosed}}= 0 \\ \Rightarrow B=0      

Posted by

himanshu.meshram

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