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

1. 0.01 2. 0.06
3. 0.02 4. 0.03

Subtopic:  Shear and bulk modulus |
 64%
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A ball falling into a lake of depth 200 m shows a 0.1% decrease in its volume at the bottom. What is the bulk modulus of the material of the ball?

1. 19.6×108N/m2               

2. 19.6×10-10N/m2

3. 19.6×1010N/m2               

4. 19.6×10-8N/m2

Subtopic:  Shear and bulk modulus |
 82%
From NCERT
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The ratio of Young's modulus of the material of two wires is 2 : 3. If the same stress is applied on both, then the ratio of elastic energy per unit volume will be:

1. 3 : 2                                   

2. 2 : 3

3. 3 : 4                                   

4. 4 : 3

Subtopic:  Potential energy of wire |
 77%
From NCERT
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If \(\mathrm{E}\) is the energy stored per unit volume in a wire having \(\mathrm{Y}\) as Young's modulus of the material, then the stress applied is:
1. 2EY

2. 2EY

3. 12EY

4. 32EY

Subtopic:  Potential energy of wire |
 86%
From NCERT
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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:

1. 0.4 cc         

2. 4×10-5cc

3. 0.025 cc       

4. 0.004 cc 

Subtopic:  Shear and bulk modulus |
 63%
From NCERT
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The length of an elastic string is \(a\) metre when the longitudinal tension is \(4\) N and \(b\) metre when the longitudinal tension is \(5\) N. The length of the string in metre when the longitudinal tension is \(9\) N will be:

1. \(a-b\) 2. \(5b-4a\)
3. \(2b-\frac{1}{4}a\) 4. \(4a-3b\)
Subtopic:  Hooke's Law |
 76%
From NCERT
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A wire of negligible mass and length 2 m is stretched by hanging a 20 kg load to its lower end keeping its upper end fixed. If work done in stretching the wire is 50 J, then the strain produced in the wire will be:

1. 0.5

2. 0.1

3. 0.4

4. 0.25

Subtopic:  Potential energy of wire |
 64%
From NCERT
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The breaking stress of a wire depends on:

1. Length of the wire
2. Applied force
3. The material of the wire
4. Area of the cross-section of the wire


 

Subtopic:  Stress - Strain |
 79%
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The increase in the length of a wire on stretching is \(0.04\)%. If Poisson's ratio for the material of wire is \(0.5,\) then the diameter of the wire will:

1. decrease by \(0.02\)%. 2. decrease by \(0.01\)%.
3. decrease by \(0.04\)%. 4. increase by \(0.03\)%.
Subtopic:  Poisson's Ratio |
 73%
From NCERT
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A uniform wire of length \(3\) m and mass \(10\) kg is suspended vertically from one end and loaded at another end by a block of mass \(10\) kg. The radius of the cross-section of the wire is \(0.1\) m. The stress in the middle of the wire is: (Take \(g=10\) ms-2)

1. \(1.4 \times10^4\) N/m2 2. \(4.8 \times10^3\) N/m2
3. \(96 \times10^4\) N/m2 4. \(3.5\times10^3\) N/m2
Subtopic:  Stress - Strain |
 66%
From NCERT
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