TION 3
[30]
Consider the figure below showing an 8 A filamentary current directed inward from infinity
to the origin on the positive x axis, and then outward to infinity along the y axis. The
resulting magnetic field strength at point $P(0.4, 0.3, 0)$ is
$\vec{H}_2 = \frac{1}{4\pi \rho_x \rho} (\sin \alpha_{2x} - \sin \alpha_{1x})\hat{a}_x + \frac{1}{4\pi \rho_y \rho} (\sin \alpha_{2y} - \sin \alpha_{1y})\hat{a}_y$
(a) Give the law and its alternative name used to derive the given
(b) Determine angle $\alpha_{1x}$, $\alpha_{2x}$, $\alpha_{1y}$ and $\alpha_{2y}$. Note: Take clockwise
positive angle.
(c) Determine the x-component magnitude of the magnetic field
at $P(0.4, 0.3, 0)$.
Consider the diagram below.
Horizontal
Control deflection
plate
Fluorescent
screen
grid
Vertical
deflection
Glass
