Stress and Strain Multiple Questions and Answers.
Exercise Questions ::
Thermal Properties of Matter
1. If the stress is S and the Young’s modulus is Y of material of a wire, the energy stored in the wire per unit volume is?
A. 2Y/S B. S/2Y C. 2S2 Y D. S2 / 2Y
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Answer: Option D
Explanation:
Elastic potential energy stored per unit volume, u=1/2×Stress×Strain=1/2×Stress×Stress/Y=S2 /2Y.
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Answer: Option C
Explanation:
If on the removal of deforming force, a body does not regain its original configuration even a little, then it is said to be a perfectly plastic body. This putty is a perfectly plastic body.
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Answer: Option B
Explanation:
Isothermal bulk modulus of a gas = Pressure of the gas = P.
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Answer: Option D
Explanation:
W = 1/2 Stretching force×increase in length W = 1/2 Fl.
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5. The term liquid crystal refers to a state that is intermediate between?
A. Crystalline solid and amorphous liquid B. Crystalline solid and vapour C. Amorphous liquid and its vapour D. A crystal immersed in a liquid
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Answer: Option A
Explanation:
Liquid crystal is a state intermediate between crystalline solid and amorphous liquid.
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