The figure below shows the stress-strain curve for two bodies A and B.

                               

Choose the correct option.

(1) A is having greater elasticity than B.

(2) B is having a greater elasticity than A.

(3) Both A and B have the same elasticity.

(4) A and B both show plasticity.

Subtopic:  Stress - Strain Curve |
 82%
From NCERT
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A rod of uniform cross-sectional area 10 mm2, weighing 5 kg and length 2 m is suspended vertically from a fixed support. What is the elongation produced in the rod?

(Young's modulus for rod = 2 x 1011 N/m2)

1. 50 × 10-6 m

2. 10-4 m

3. 15 × 10-6 m

4. 25 × 10-6 m

Subtopic:  Stress - Strain |
From NCERT
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Unit of tensile strain is:

(1) meter

(2) newton-metre

(3) meter2

(4) Unitless

Subtopic:  Stress - Strain |
 87%
From NCERT
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Compressibility of a substance is equal to reciprocal of:

(1) Bulk modulus

(2) Young's modulus

(3) Rigidity modulus

(4) Poisson's ratio

Subtopic:  Shear and bulk modulus |
 89%
From NCERT
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For two different material wires of the same dimensions, Young's modulus is:

                                  

(1) Higher for A

(2) Higher for B

(3) Same for both

(4) Infinite for both

Subtopic:  Stress - Strain Curve |
 85%
From NCERT
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When a load of 1 kg is hung from the wire, then the extension of 2 mm is produced. Then work done by restoring force is:

(1) 200 mJ

(2) 400 mJ

(3) 10 mJ

(4) 20 mJ

Subtopic:  Potential energy of wire |
 73%
From NCERT
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The longitudinal strain is possible in:

(1) Liquid

(2) Solid

(3) Gasses

(4) All of these

Subtopic:  Stress - Strain |
 80%
From NCERT
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Breaking stress of a steel wire of length L and radius r is F. If its radius is doubled and length is halved, its new breaking stress will be:

(1) 2F

(2) F

(3) F/2

(4) 4F

Subtopic:  Stress - Strain |
 60%
From NCERT
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Compressed rubber ball has:

(1) decreased potential energy.

(2) increased potential energy.

(3) decreased kinetic energy.

(4) increased kinetic energy.

Subtopic:  Elasticity |
 74%
From NCERT
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Stress vs strain graphs for two different wires \(A\) and \(B\) are given. If \(Y_A\) and \(Y_B\) are Young's moduli of the materials, then:
                
  

1. \( \mathrm{Y}_{\mathrm{A}}=\sqrt{3} \mathrm{Y}_{\mathrm{B}} \)
2. \( \sqrt{3} \mathrm{Y}_{\mathrm{A}}=\mathrm{Y}_{\mathrm{B}} \)
3. \( \mathrm{Y}_{\mathrm{A}}=3 \mathrm{Y}_{\mathrm{B}} \)
4. \( 3 \mathrm{Y}_{\mathrm{A}}=\mathrm{Y}_{\mathrm{B}} \)

Subtopic:  Stress - Strain Curve |
 76%
From NCERT
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