Thermodynamics

Which of the following is not a thermodynamical variable

• Temperature

• Volume

• Entropy

• hight

The distance travelled by an atom between two successive collisions is called

• Wavelength

• Displacement

• Free path

• Mean free path

The magnetic substance that is used in Adiabatic demagnetization is

• Diamagnetic

• para magnetic

• Ferro magnetic

• Ferri magnetic

The region in which ozone layer exists is

• Stratosphere

• Troposphere

• Mesosphere

• Thermosphere

The gaseous layer which protects human life from on earth uv radiation is

• Oxygen

• ozone

• Nitrogen

• Carbondioxide

The entropy in the universe

• Increases

• Decreases

• remains constant

• depends on time

Angstrom pyrheliometer is used to find

• Gravitational constant

• Solar constant

• preportionality constant

• Gas constant

The principle used in the determination of Solar constant is

• Joule Kelvin Effect

• Peltier Effect

• Seebeck effect

• Maxwell effect

The thermodynamic process which occurs at constant pressure is

• isothermal

• Isochoric

• Isomeric

• Isobaric

which of the following is a themodynamic potential

• Internal energy

• Helmholtz function

• gibb's energy

• entholpy