In which case there is maximum extension in the wire, if same force is applied on each wire

(a) L = 500 cm, d = 0.05 mm

(b) L = 200 cm, d = 0.02 mm

(c) L = 300 cm, d = 0.03 mm

(d) L = 400 cm, d = 0.01 mm

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The extension of a wire by the application of load is 3 mm. The extension in a wire of the same material and length but half the radius by the same load is -

(a)12 mm                                 

(b)0.75 mm

(c)15 mm

(d)6 mm

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The isothermal elasticity of a gas is equal to

(a) Density                                     (b) Volume

(c) Pressure                                    (d) Specific heat

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Stress-strain
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The adiabatic elasticity of a gas is equal to

(a) γ×density                                (b) γ×volume

(c) γ×pressure                              (d) γ×specific heat

Concept Questions :-

Stress-strain
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The specific heat at constant pressure and at constant volume for an ideal gas are Cp and Cv and its adiabatic and isothermal elasticities are E andEθ  respectively. The  ratio of E to Eθ is

(a) Cv/Cp

(b) Cp/Cv

(c) CpCv

(d) 1/CpCv

Concept Questions :-

Stress-strain
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The compressibility of water is 4×10-5 per unit atmospheric pressure. The decrease in volume of 100 cubic centimeter of water under a pressure of 100 atmosphere will be -

(a) 0.4 cc           (b) 4×10-5cc

(c) 0.025 cc       (d) 0.004 cc 

Concept Questions :-

Stress-strain
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If a rubber ball is taken at the depth of 200 m in a pool, its volume decreases by 0.1%. If the density of the water is 1×103kg/m3 and g=10m/s2, then the volume elasticity in  will be

(a) 108                                        (b) 2×108

(c)109                                         (d) 2×109

Concept Questions :-

Stress-strain
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When a pressure of 100 atmosphere is applied on a spherical ball, then its volume reduces by 0.01%. The bulk modulus of the material of the rubber in dyne / cm2 is:

(a) 10×1012                                (b) 100×1012

(c) 1×1012                                  (d) 20×1012

Concept Questions :-

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A uniform cube is subjected to volume compression. If each side is decreased by 1%, then bulk strain is

(a) 0.01                              (b) 0.06

(c) 0.02                              (d) 0.03

Concept Questions :-

Stress-strain
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A ball falling in a lake of depth 200 m shows 0.1% decrease in its volume at the bottom. What is the bulk modulus of the material of the ball

(a) 19.6×108N/m2                (b) 19.6×10-10N/m2

(c) 19.6×1010N/m2               (d) 19.6×10-8N/m2

Concept Questions :-

Stress-strain
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