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Consider the following processes : 1. Extension of a spring 2. Plastic deformation of a material 3. Magnetization of a material exhibiting hysteresis Which of the above process are irreversible? (a) 1 and 2 only (b) 1 and 3 only (c) 1 and 3 only (d) 1, 2 and 3 |
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Answer» (c) 1 and 3 only A process is reversible if both the system and surroundings are restored to initial condition. Thus, plastic deformation of a material and magnetization of a material exhibiting hysteresis are irreversible processes. The spring after extension will get back to its original position after removal of load, hence it can be considered as reversible. |
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