A positive charge q moves with velocity $$\vec{v} = 3.0 \times 10^6\ \mathrm{m/s}$$ in the $$+y$$ direction. At time $$t=0$$, the charge is at the origin. For a point $$P$$ located at $$(2.0\ \mathrm{cm}, 0, 0)$$, at what time $$t$$ will the magnetic field at $$P$$ due to the moving charge reach its maximum magnitude?