This magnet is capable of rendering the needle less sensitive or of making it astatic.
By arranging two magnetized needles with their poles opposite each other, Fig. 92, an astatic needle is formed.
Fig. 67 shows an astatic galvanometer for measuring weak currents.
This is a degree of sensitiveness that cannot be obtained with any of the astatic instruments known up to the present.
Fig. 139 shows how a current can be generated by two coils, H being connected to an astatic galvanoscope and E to a battery.
(A) Join the ends of coil H (Fig. 164) to the astatic galvanoscope.
There is much worry and misery in the world because so many are astatic, like a compass that has lost its loadstone.
An astatic needle is a combination of magnetised needles with their poles turned opposite ways.
If two magnetic needles of equal size and astatic galvanometers.
Such a helix is caused to stand between the two poles N's' of an astatic system.
astatic a·stat·ic (ə-stāt'ĭk)
Relating to astasia.