Question

An equilateral triangle is made by uniform wires $AB, BC, CA. A$ current $I$ enters at $A$ and leaves from the mid point of $BC$. If the lengths of each side of the triangle is $L$, the magnetic field $B$ at the centroid $O$ of the triangle is

• A. $\frac{\mu_{0}}{4\pi}\left(\frac{4I}{L}\right)$
• B. $\frac{\mu_{0}}{3\pi}\left(\frac{4I}{L}\right)$
• C. $\frac{\mu_{0}}{4\pi}\left(\frac{2I}{L}\right)$
• D. Zero

Answer 1

Answer: (D)

Zero

Answer 2

The given situation can be shown as