The deflection of the compass needle decreases as the distance from the current-carrying wire increases, indicating a diminishing magnetic field influence with greater distance.

The magnetic field produced by a current-carrying straight wire decreases as the distance from the wire increases, as illustrated by the concentric circles becoming larger in the figure.

When the compass is moved away from the copper wire while maintaining the same current, the deflection in the needle decreases.

An increase in current results in an increase in the magnitude of the magnetic field produced at a given point.

The deflection of the compass needle increases as the current in the copper wire is increased.