The material which practically does not show elastic after effect is
(1) Copper
(2) Rubber
(3) Steel
(4) Quartz
The relationship between Young's modulus Y, Bulk modulus K and modulus of rigidity n is
(1)
(2)
(3)
(4)
Why the spring is made up of steel in comparison of copper?
(1) Copper is more costly than steel
(2) Copper is more elastic than steel
(3) Steel is more elastic than copper
(4) None of the above
The quality of the material which opposes the change in shape, volume or length is called
(1) Intermolecular repulsion
(2) Intermolecular behaviour
(3) Viscosity
(4) Elasticity
Which one of the following substances possesses the highest elasticity:
(1) Rubber
(2) Glass
(3) Steel
(4) Copper
Which of the following affects the elasticity of a substance
1. Hammering and annealing
2. Change in temperature
3. Impurity in substance
4. All of these
The Young's modulus of the material of a wire is and there is no transverse strain in it, then its modulus of rigidity will be
(1)
(2)
(3)
(4) None of the above
The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?
1. | length = \(100\) cm, diameter = \(1\) mm |
2. | length = \(200\) cm, diameter = \(2\) mm |
3. | length = \(300\) cm, diameter = \(3\) mm |
4. | length = \(50\) cm, diameter = \(0.5\) mm |
Bridges are declared unsafe after a long time of their use due to:
(1) Elastic after effect
(2) Elastic fatigue
(3) Plasticity
(4) Both (1) & (2)
A steel wire is fixed at its one end on the roof. At other ends of the wire, 1 kg mass is hanged so that the energy stored in the wire is E. The energy stored in the same wire if we hang 2 kg mass instead of 1 kg is:
(1) 2E
(2) 4E
(3) 8E
(4) E