What is the value of Poisson's ratio for an incompressible material?

(1) Zero

(2) 0.2

(3) 0.5

(4) Infinite

Subtopic:  Poisson's Ratio |
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If the Poisson's ratio of a material is 0.5, then its bulk modulus is equal to:

(1) Zero

(2) Young's modulus

(3) Infinite

(4) Three times Young's modulus

Subtopic:  Poisson's Ratio |
 61%
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A uniform wire of cross-sectional area A is stretched by a certain force so that its length is elongated by x. What should be the cross-sectional area of the wire, so that elongation becomes x2 on applying the same force?

(1) A

(2) 2A

(3) 4A

(4) 8A

Subtopic:  Young's modulus |
 87%
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A wire suspended vertically from one of its ends is stretched by attaching a weight of 100 N. If the elastic energy stored in the wire is 0.1 J. The elongation in the wire is:

(1) 1 mm

(2) 2 mm

(3) 3 mm

(4) 4 mm

Subtopic:  Potential energy of wire |
 83%
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Breaking stress of a wire of length L and radius r is B. If another wire made of the same material has length 2L and radius 2r, its breaking stress will be:

(1) 2B

(2) B4

(3) B

(4) 4B

Subtopic:  Stress - Strain |
 55%
From NCERT
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If E is the energy stored per unit volume in a wire having Young's modulus of the material Y, then stress applied is:

1.  2EY

2.  2EY

3.  12EY

4.  32EY

Subtopic:  Potential energy of wire |
 80%
From NCERT
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Two wires of the same material have lengths in the ratio of 1: 2. If they are stretched by applying equal forces, the increase in lengths is the same. The ratio of their respective radii is:

(1) 1: 1

(2) 1: 2

(3) 1: 2

(4) 2: 1

Subtopic:  Young's modulus |
 78%
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The value of Poisson's ratio cannot be:

(1) 0.05

(2) 0.32

(3) 0.63

(4) 0.49

Subtopic:  Poisson's Ratio |
 81%
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A steel wire of cross-sectional area 3 x 10-6 m2 can withstand a maximum strain of 10-3. If Young's modulus of steel is 2 x 1011 Nm-2, then maximum mass which the wire can hold is: (Take g =10 m/s2)

(1) 40 kg

(2) 100 kg

(3) 80 kg

(4) 60 kg

Subtopic:  Stress - Strain |
 85%
From NCERT
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If Poisson's ratio σ is 12 for material, then the material is

(1) Incompressible

(2) Elastic fatigue

(3) Compressible

(4) Plastic

Subtopic:  Poisson's Ratio |
 64%
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