A steel wire of 1 m long and cross section area is hang from rigid end. When mass of 1kg is hung from it then change in length will be: (given )
1. 0.5 mm
2. 0.25 mm
3. 0.05 mm
4. 5 mm
An iron rod of length 2m and cross section area of 50 X , is stretched by 0.5 mm, when a mass of 250 kg is hung from its lower end. Young's modulus of the iron rod is-
1.
2.
3.
4.
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.