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What do you mean by " Elastic after effect"? |
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Answer» When the deforming force is removed, the bodies tend to return to their respective original state. It is observed that while some bodies return to their original states, immediately, others take appreciably long time to do so. For example, a quartz fibre returns immediately to its normal state, when the twisting torque acting on it ceases to act. On the other hand, a glass fibre will take hours to return to its original state. This delay in regaining its original state by a body after the removal of the deforming force is called elastic after effect. In galvanometers and electrometers, the suspensions made from quartz and phosphor-bronze are used as the elastic after effect is negligible in the wires of these materials. |
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