The Young's modulus of a wire is numerically equal to the stress at a point when:
1. | The strain produced in the wire is equal to unity. |
2. | The length of the wire gets doubled. |
3. | The length increases by \(100\%.\) |
4. | All of these. |
Practical value of Poisson's ratio lies between:
(1) -1 to 0.5
(2) -0.5 to 1
(3) 0 to 0.5
(4) 0 to 1
Which of the following has the greatest elasticity?
(1) Rubber
(2) Steel
(3) Wood
(4) Mud
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.
A rod of uniform cross-sectional area 10 , 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 )
1. 50 × m
2. m
3. 15 × m
4. 25 × m
Unit of tensile strain is:
(1) meter
(2) newton-metre
(3)
(4) Unitless
Compressibility of a substance is equal to reciprocal of:
(1) Bulk modulus
(2) Young's modulus
(3) Rigidity modulus
(4) Poisson's ratio
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
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
The longitudinal strain is possible in:
(1) Liquid
(2) Solid
(3) Gasses
(4) All of these