There are times when eddy current damping can be put to good use. For example, in a moving coil galvanometer, the pointer is light and highly sensitive. When displaced by a current, it tends to oscillate back and forth, coming to rest slowly. This may take several seconds. Clearly, when such a metre is used extensively, it is desirable to eliminate the oscillation time. This may be done easily by placing a light metal plate on the bottom end of the pointer and allowing the plate to swing between the poles of a small magnetic field. This is usually enough to damp the motion of the pointer and bring it to rest quickly.