Beginning at time $\backslash ($ t$=0\backslash )$ an electron accelerates very briefly in the direction having an angle $\backslash (\backslash$theta $\backslash )$ with the $\backslash ($ x $\backslash )-$axis, as shown in the diagram. The magnitude of this acceleration is $\backslash ($ a $\backslash ).$ Detectors of electric and magnetic fields are placed at locations $\backslash ($ A$,$ B $\backslash ),$ and $\backslash ($ C $\backslash ),$ all a distance $\backslash ($ d $\backslash )$ from the charge.

What can we say about the radiative MAGNETIC field at location $\backslash ($ A $\backslash )?$

A$.$ The radiative magnetic field points out of the page

B$.$ The radiative magnetic field points in the opposite direction from the radiative electric field

C$.$ The radiative magnetic field points into the page

What is the magnitude of the radiative magnetic field at location $\backslash ($ A $\backslash )?$ Use $\backslash ($ k $\backslash )$ for Coulomb's constant, $\backslash ($ c $\backslash )$ for speed of light, $\backslash ($ e $\backslash )$ for electric charge, and directly type "theta" for angle $\backslash (\backslash$theta $\backslash )$ in your answer.

$\backslash [$

B$=$

$\backslash ]$