The unit of Stefan's constant $\sigma$ is : [This question includes concepts from Thermal Properties of Matter chapter]

1. $W{m}^{-2}{K}^{-1}$

2. $W{m}^2{K}^{-4}$

3. $W{m}^{-2}{K}^{-4}$

4. $W{m}^{-2}{K}^4$

Joule-second is the unit of :

1. Work

2. Momentum

3. Pressure

4. Angular momentum

Unit of energy in SI system is 

1. Erg

2. Calorie

3. Joule

4. Electron volt

A cube has a numerically equal volume and surface area. The volume of such a cube is :

1. 216 units

2. 1000 units

3. 2000 units

4. 3000 units

Wavelength of ray of light is $0.00006m$. It is equal to 

1. $6microns$

2. $60microns$

3. $600microns$

4. $0.6microns$

Electron volt is a unit of 

1. Charge

2. Potential difference

3. Momentum

4. Energy

Temperature can be expressed as a derived quantity in terms of any of the following:

Unit of power is:

1. Kilowatt

2. Kilowatt-hour

3. Dyne

4. Joule

The density of wood is $0.5gm/cc$ in the CGS system of units. The corresponding value in MKS units is :

1. 500

2. 5

3. 0.5

4. 5000

Which is the correct unit for measuring nuclear radii

1. Micron

2. Millimetre

3. Angstrom

4. Fermi