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  • A current I flows along the length of an infinite long straight and thin - walled pipe thenOption: 1 <img alt="\vec{B}" src="https://learn.careers360

A current I flows along the length of an infinite long straight and thin - walled pipe then

Option: 1

\vec{B} at all points inside pipe is same but non-zero


Option: 2

\vec{B} at any point inside pipe is zero


Option: 3

\vec{B} is zero only at axis of pipe


Option: 4

\vec{B} is different at different points


Answers (1)

best_answer

As we learned

Ampere's Law -

It gives another method to calculate the magnetic field due to the given current distribution. 

Amperian loop of radius r inside cylinder

 Applying ampere's law \oint B\cdot dl=\mu oI

For closed path.

I=0 inside pipe

So \vec{B}=0 every point

 

Posted by

Sayak

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