C) $\dfrac{9}{2}\left( {\dfrac{{{\mu _0}I}}{{\pi a}}} \right) …

WEB4 days ago · Hint: From the given figure, we deduct that the magnetic field at P will be only due to the base of the triangle. The other two sides will not contribute. Biot-Savart’s law will give the magnitude of this magnetic field to be ...