I think you are talking about the Mouse.
due to reflecting torque pointer moves in one direction by due to controlling torque pointer moves in opposite direction therefore pointer oscillate in forward and backward direction.if there is no deflecting torque the device to ensure that the pointer comes to rest quickly with minimum oscillation at its correct reading position is known as damping device...
POINTER
Pointer device.
The pointer on a galvenometer moves due to magnetic force between the current carrying coil in the pointer assembly and the permanent magnet surrounding that coil.
That is normal when revving.
touch pad
A weathervane is a device that shows the direction of the wind. It typically has a pointer that moves with the wind and indicates which way it is blowing. This helps in determining the wind direction by showing where the wind is coming from.
compass
A weather or wind - vane .
The distance that the pointer of a galvanometer moves is determined by the strength of the magnetic field present in the coils or loops of the armature. When an electric current flows through the coils, it interacts with the magnetic field produced by the coils, resulting in a deflection of the pointer. The greater the magnetism in the loops, the larger the deflection of the pointer.
mouse pointer
Basically, the pointer moves due to measuring the direct current (flow of electric charge) through an electric circuit.