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

1. Shearing
2. Longitudinal
3. Volume       
4. shearing and longitudinal

Subtopic:  Shear and bulk modulus |
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The Young's modulus of the material of a wire is \(6\times 10^{12}~\text{N/m}^2\) and there is no transverse strain in it, then its modulus of rigidity will be:

1. \(3\times 10^{12}~\text{N/m}^2\)
2. \(2\times 10^{12}~\text{N/m}^2\)
3. \(10^{12}~\text{N/m}^2\)
4. None of the above

Subtopic:  Elasticity |
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Modulus of rigidity of a liquid:

1. Non zero constant

2. Infinite

3. Zero

4. Can not be predicted

Subtopic:  Shear and bulk modulus |
 63%
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A cube of aluminium of sides \(0.1~\text{m}\) 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:
1. \(0.02\)                                   
2. \(0.1\)
3. \(0.005\)                               
4. \(0.002\)

Subtopic:  Stress - Strain |
 72%
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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

1. 12°                                     

2. 0.12°

3. 1.2°                                     

4. 0.012°

Subtopic:  Stress - Strain |
 68%
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A rod of length l and radius r is joined to a rod of length l/2 and radius r/2 of same material. The free end of small rod is fixed to a rigid base and the free end of larger rod is given a twist of θ, the twist angle at the joint will be 

1.  θ/4                         
2. θ/2
3. 5θ/6                       
4. 8θ/9

Subtopic:  Stress - Strain |
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Shearing stress causes a change in-

1.   Length                              

2.   Breadth

3.   Shape                               

4.   Volume

Subtopic:  Stress - Strain |
 76%
From NCERT
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To break a wire, a force of 106N/m2 is required. If the density of the material is 3×103 kg/m3, then the length of the wire which will break by its own weight will be -

1. 34 m                             
2. 30 m
3. 300 m                          
4. 3 m

Subtopic:  Stress - Strain |
 54%
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One end of a uniform wire of length \(L\) and of weight \(W\) is attached rigidly to a point in the roof and a weight \(W_1\) is suspended from its lower end. If \(S\) is the area of cross-section of the wire, the stress in the wire at a height \(\frac{3L}{4}\) from its lower end is:
1. \(\frac{W_1}{S}\)
2. \(\frac{W_1+\left(\frac{W}{4}\right)}{S}\)
3. \(\frac{W_1+\left(\frac{3W}{4}\right)}{S}\)
4. \(\frac{W_1+W}{S}\)

Subtopic:  Stress - Strain |
 76%
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The strain-stress curves of three wires of different materials are shown in the figure. \(P\), \(Q\) and \(R\) are the elastic limits of the wires. The figure shows that:
           

1. Elasticity of wire \(P\) is maximum.
2. Elasticity of wire \(Q\) is maximum.
3. Tensile strength of \(R\) is maximum.
4. None of the above is true.
Subtopic:  Stress - Strain Curve |
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