When strain is produced in a body within elastic limit, its internal energy
Correct answer: C. Increases
- A. Remains constant
- B. Decreases
- C. Increases
- D. None of the above
Explanation
When strain is applied to a body within the elastic limit, work is done to deform the body. According to the principles of elasticity, this work is stored as potential energy, thus increasing the internal energy of the system. Therefore, the internal energy increases. Option A is incorrect because internal energy does not remain constant; it changes due to the work done during deformation. Option B is incorrect because the energy does not decrease; instead, it increases as potential energy is accumulated. Option D is incorrect because the correct behaviour of internal energy is described in one of the given options.
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Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
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