Topic: Magnetic Effects of Current
Subtopic: Magnetic Field Due to Straight Current Carrying Wire
Adjoining figure shows a rectangular loop of conductor carrying a current i. The length and breadth of the loop are respectively a and b. The magnetic field at the centre of loop is :

\[\frac{\mu_{0}i\left( a+b \right)}{2\pi \sqrt{a^{2}+b^{2}}}\]
\[\frac{\mu_{0}iab}{2\pi \sqrt{a^{2}+b^{2}}}\]
\[\frac{\mu_{0}i\left( a+b \right)}{\pi \sqrt{a^{2}+b^{2}}}\]
\[\frac{2\mu_{0}i\sqrt{a^{2}+b^{2}}}{\pi ab}\]
No solution provided for this question.
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