The Bulk modulus for an incompressible liquid is

(a) Zero                                           (b) Unity

(c) Infinity                                       (d) Between 0 to 1

Concept Questions :-

Stress-strain
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The pressure applied from all directions on a cube is P. How much its temperature should be raised to maintain the original volume ? The volume elasticity of the cube is  β and the coefficient of volume expansion is α -

(a) Pαβ                                 (b) Pαβ

(c) Pβα                                 (d) αβP

 

Concept Questions :-

Stress-strain
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The ratio of lengths of two rods A and B of same material is 1 : 2 and the ratio of their radii is 2 : 1, then the ratio of modulus of rigidity of A and B will be

(a)       4 : 1                                           (b)   16 : 1

(c)       8 : 1                                           (d)   1 : 1

Concept Questions :-

Stress-strain
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Two wires A and B of same length and of the same material have the respective radii r1 and r2. Their one end is fixed with a rigid support, and at the other end equal twisting couple is applied. Then the ratio of the angle of twist at the end of A and the angle of twist at the end of B will be

(a) r12r22                                           (b) r22r12

(c) r24r14                                           (d) r14r24

Concept Questions :-

Stress-strain
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When a spiral spring is stretched by suspending a load on it, the strain produced is called-

(a)  Shearing                                  (b)   Longitudinal

(c)  Volume                                    (d)   Transverse

Concept Questions :-

Stress-strain
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The Young's modulus of the material of a wire is 6×1012N/m2 and  there is no transverse strain in it, then its modulus of rigidity will be

(a) 3×1012N/m2                        (b) 2×1012N/m2

(c) 1012N/m2                             (d) None of the above

Concept Questions :-

Poisson ratio
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If the Young's modulus of the material is 3 times its modulus of rigidity, then its volume elasticity will be

(a) Zero                              (b) Infinity

(c) 2×1010N/m2           (d) 3×1010N/m2

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Modulus of rigidity of a liquid

(a) Non zero constant

(b) Infinite

(c) Zero

(d) Can not be predicted

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A cube of aluminium of sides 0.1 m is subjected to a shearing force of 100 N. The top face of the cube is displaced through 0.02 cm with respect to the bottom face. The shearing strain would be

(a) 0.02                                   (b) 0.1

(c) 0.005                                 (d) 0.002

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The upper end of a wire of radius 4 mm and length 100 cm is clamped and its other end is twisted through an angle of 30°. Then angle of shear is

(a) 12°                                      (b) 0.12°

(c) 1.2°                                     (d) 0.012°

Concept Questions :-

Stress-strain
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