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Unit of Stefan's constant is : -...

Unit of Stefan's constant is : -

A

W `m^(-2) K^(-4)`

B

J `m^(-2) K^(-4)`

C

W `m^(-1)K^(-1)`

D

W `m^(-2) K^(-2)`

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A
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The unit of Stefan's constant sigma is

What is Stefan's constant ?

Calculate the temperature at which a perfect black body radiates at the rate of 1 W cm^(-2) , value of Stefan's constant, sigma = 5.67 xx 10^(-5) W m^(-2) K^(-8)

The ratio of SI Unit to CGS unit of Planck's constant is

If the filament of a 100 W bulb has an area 0.25cm^2 and behaves as a perfect black body. Find the wavelength corresponding to the maximum in its energy distribution. Given that Stefan's constant is sigma=5.67xx10^(-8) J//m^(2)s K^(4) .

If the filament of a 100 W bulb has an area 0.25cm^2 and behaves as a perfect block body. Find the wavelength corresponding to the maximum in its energy distribution. Given that Stefan's constant is sigma=5.67xx10^(-8) J//m^(2)s K^(4) .

Assume that Solar constant is 1.4 kW//m^(2) , radius of sun is 7 xx 10^(5) km and the distance of earth from centre of sun is 1.5 xx 10^(8) km. Stefan's constant is 5.67 xx 10^(-8) Wm^(2) K^(-4) find the approximate temperature of sun

Dimensional formula for stefan’s constant is: (here K denotes the temperature)

Power emitted per unit area of a black body is R " watt/m"^(2) . At what wavelength will the power radiated by black body be maximum is stefan's constant is sigma and Wien's constant is b then.

The dimension of sigma b^4 (where sigma is Stefan's constant and b is Wien's constant) are [ML^4 T^(-3)] is it true.

AAKASH SERIES-UNITS AND MEASUREMENTS-EXERCISE -1 A
  1. If P is X-ray unit and Q is micron, then P/Q=

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  2. Which of the following is not expressed correctly with respect to unit...

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  3. Unit of Stefan's constant is : -

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  4. A and B are the numerical values of a physical quantity and C and D ar...

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  5. Derived unit is

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  6. J Kg^(-1) K^(-1) is the unit of

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  7. The ratio of SI Unit to CGS unit of Planck's constant is

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  8. Steradian is the solid angle subtended at the centre of the sphere by ...

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  9. The dimensional formula for coefficient of viscosity is

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  10. [ML^(-1)T^(-2)] is the dimensional formula of

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  11. Heat and Thermal capacity differ in the dimensions of

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  12. Force constant and surface tension have the same dimensions in

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  13. Assertion:Relative magnetic permeability has no units and no dimension...

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  14. (x^2)/("mass") has dimensions of kinetic energy. Then x has the dimens...

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  15. The quantity having negative dimensions in mass is

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  16. h d G has the dimensions of (h = height , d = density , G = Gravitatio...

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  17. The quantity having dimensions only in temperature is

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  18. The dimensional formula for areal velocity is

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  19. If R is the Rydberg constant , C is the velocity and h is the planck's...

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  20. If x times momentum is work , then the dimensions of x are

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