In which case, there is a maximum extension in the wire, if the same force is applied on each wire?
1. L = 500 cm, d = 0.05 mm
2. L = 200 cm, d = 0.02 mm
3. L = 300 cm, d = 0.03 mm
4. L = 400 cm, d = 0.01 mm
The extension of a wire by the application of load is 3 mm. The extension in a wire of the same material and length but half the radius by the same load is -
1. 12 mm
2. 0.75 mm
3. 15 mm
4. 6 mm
The isothermal elasticity of a gas is equal to
1. Density
2. Volume
3. Pressure
4. Specific heat
The adiabatic elasticity of a gas is equal to
1. γ × density
2. γ × volume
3. γ × pressure
4. γ × specific heat
The specific heat at constant pressure and at constant volume for an ideal gas are and and its adiabatic and isothermal elasticities are and respectively. The ratio of to is
1.
2.
3.
4.
If the volume of the given mass of a gas is increased four times and the temperature is raised from 27°C to 127°C. The isothermal elasticity will become
1. 4 times
2. 1/4 times
3. 3 times
4. 1/3 times
The compressibility of water is 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.
3. 0.025 cc
4. 0.004 cc
If a rubber ball is taken at the depth of 200 m in a pool, its volume decreases by 0.1%. If the density of the water is and , then the volume elasticity in will be
1.
2.
3.
4.
When a pressure of 100 atmosphere is applied on a spherical ball, then its volume reduces by 0.01%. The bulk modulus of the material of the rubber in is:
1.
2.
3.
4.
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