In steel, the Young's modulus and the strain at the breaking point are 2×1011Nm-2 and 0.15 respectively. The stress at the breaking point for steel is therefore -

(1) 1.33×1011Nm-2           

(2) 1.33×1012Nm-2

(3) 7.5×10-13Nm-2           

(4) 3×1010Nm-2

Subtopic:  Young's modulus |
 82%
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Which one of the following substances possesses the highest elasticity:

(1) Rubber                             

(2) Glass

(3) Steel                               

(4) Copper

Subtopic:  Elasticity |
 76%
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Which one of the following quantities does not have the unit of force per unit area?

1. Stress                                      

2. Strain

3. Young's modulus of elasticity

4. Pressure

Subtopic:  Stress - Strain |
 85%
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A copper wire and a steel wire of the same diameter and length are connected end to end and a force is applied, which stretches their combined length by 1 cm. The two wires will have

(1)   Different stresses and strains

(2)   The same stress and strain

(3)   The same strain but different stresses

(4)   The same stress but different strains

Subtopic:  Young's modulus |
 57%
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The possible value of Poisson's ratio is

(1) 1                                       

(2) 0.9

(3) 0.8                                     

(4) 0.4

Subtopic:  Poisson's Ratio |
 65%
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Which of the following affects the elasticity of a substance

1. Hammering and annealing

2. Change in temperature

3. Impurity in substance

4. All of these

Subtopic:  Elasticity |
 88%
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A wire of diameter 1mm  breaks under a tension of 1000 N. Another wire, of the same material as that of the first one, but of diameter 2 mm, breaks under a tension of:

(1)   500 N                               

(2)   1000 N

(3)   10000 N                           

(4)   4000 N

Subtopic:  Stress - Strain |
 75%
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There is no change in the volume of a wire due to change in its length on stretching. The Poisson's ratio of the material of the wire is

(1)   + 0.50                               

(2)   – 0.50

(3)   0.25                                  

(4)   – 0.25

Subtopic:  Poisson's Ratio |
 61%
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The force required to stretch a steel wire of cross-section 1 cm2 to 1.1 times its length would be Y=2×1011 Nm-2

(1) 2×106N                               

(2) 2×103N

(3) 2×10-6N                             

(4) 2×10-7N

Subtopic:  Young's modulus |
 76%
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A fixed volume of iron is drawn into a wire of length L. The extension x produced in this wire by a constant force F is proportional to:

(1) 1L2                                             

(2) 1L

(3) L2                                               

(4) L

Subtopic:  Hooke's Law |
 53%
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