Rank the value of $\oint {\vec B.\overrightarrow {dl} } $ for the closed paths shown in figure from the smallest to largest
Medium
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use $\oint \overrightarrow{\mathrm{B}} \cdot \overrightarrow{\mathrm{d} 1}=\mu_{0} \mathrm{I}_{\mathrm{enclosed}}$
Net current enclosed by path $a$ is zero
Net current enclosed by path $c$ is $A$
Net current enclosed by path $d$ is $3\, \mathrm{A}$
Net current enclosed by path $b$ is $5\, \mathrm{A}$
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