Rankers Physics
Topic: Magnetic Effects of Current
Subtopic: Ampere's Circuital Law

In the adjacent figure is shown a closed path P. A long straight conductor carrying a current I passes through O and perpendicular to the plane of the paper. Then which of the following holds good ?     Image related to
\[\int_{P}^{}\overrightarrow{B}.\overrightarrow{dl}=0\]
\[\int_{P}^{}\overrightarrow{B}.\overrightarrow{dl}=\mu_{0}I\]
\[\int_{P}^{}\overrightarrow{B}.\overrightarrow{dl}>\mu_{0}I\]
None of these

Solution:

As Current enclosed is zero.  \[\int_{P}^{}\overrightarrow{B}.\overrightarrow{dl}=0\]

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