Two Parallel Wires?

Question

Two long parallel wires are a center-to-center distance of 4.20 cm apart and carry equal anti-parallel currents of 2.90 A. Find the magnetic field intensity at the point P which is equidistant from the wires. (R = 9.00 cm).

http://img524.imageshack.us/img524/4108/twoparallelwireshf4.jpg

Answer 1

The answer is quite simple, as , the point P is equidistant from both the wires which carry opposite direction of equal current. The field intensity at point P is zero as the direction of magnetic field due to each conductor is equal and opposite at point P

Answer 2

Why do these questions ask people to 'find' something? It is calculation with some stupid formula. 'Calculate' is a better verb. Find implies that you are looking for the answer to be already written down... like in yahoo answers or something like that.