The distance from the conductor is inversely proportional to the magnetic field strength. As the distance from the current-carrying conductor increases, the magnetic field strength decreases. This is evident from the diminishing deflection of the compass needle at greater distances ...

The concentric circles representing the magnetic field around a current-carrying straight wire become larger as the distance from the wire increases. This observation highlights that the magnetic field weakens with increasing distance from the conductor.

If the compass is moved farther from the conducting wire (e.g., at point Q) while maintaining a constant current, the deflection in the needle decreases. The magnetic field strength decreases with an increase in distance from the current-carrying conductor.

The change in deflection shows that there is a direct relationship between the current through the wire and the strength of the magnetic field produced. An increase in current leads to an increase in magnetic field strength.

As the current in the copper wire increases, the deflection of the compass needle also increases. This indicates that the magnitude of the magnetic field produced at a given point increases with an increase in current.