QUESTION $2$

How does the magnetic field strength generated by a long$-$straight, horizontally$-$oriented current$-$carrying wire depend on the horizontal position of the detector, assuming a fixed current and a fixed vertical position?

If the horizontal distance from the center of the wire doubles, then the magnetic field strength also doubles

If the horizontal distance from the center of the wire doubles, then the magnetic field strength halves

If the horizontal distance from the center of the wire doubles, then the magnetic field strength is unchanged

If the horizontal distance from the center of the wire doubles, then the magnetic field strength is quadrupled $(4$ times as $.$ much as before$)$

None of the above