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Standard VII

Physics

Wien's Displacement Law

The amount of...

Question

The amount of heat energy radiated per second by a surface depends upon:

Area of the surface

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Difference of temperature between the surface and its surroundings

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Nature of the surface

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All the above

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Solution

The correct option is D All the above
Refer Stefan's Law of Radiation: $Q = η σ A δ T^{4}$
where, $σ = c o n d u c t i v i t y A$ = area $T$ = difference of the temperature

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Similar questions

Q. Calculate the amount of heat radiated per second by a body of surface area

12 {c m}^{2}

kept in thermal equilibrium in a room temperature

20^{o} C

. The emissivity of the surface

= 0.80

and

σ = 6.0 \times 10^{- 8} W / m^{2} - K^{4}

Calculate the amount of heat radiated per second by a body of surface area 12 $c m^{2}$ kept in thermal equilibrium in a room at temperature $20^{0}$ C. The emissivity of the surface = 0.80 and $σ = 6.0 \times 10^{- 8} W m^{- 2} K^{- 4}$

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σ = 6 \times 10^{- 8} W m^{- 2} K^{- 4}

Q. Assume that the total surface area of a human body is

1.6 m^{2}

and that it radiates like as ideal radiator . calculate the amount of energy radiated per second by the body if the body temperature is

37^{0} C

.stefan constant

α i s 6.0 \times 10^{- 8} W m^{- 2} K^{- 4}

Q. Assume that the total surface area of a human body is

1.6 m^{2}

and that it radiates like an ideal radiator. Calculate the amount of energy radiated per second by the body if the body temperature is

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The amount of heat energy radiated per second by a surface depends upon:

The correct option is D All the aboveRefer Stefan's Law of Radiation: Q=ησAδT4where, σ=conductivity A = area T = difference of the temperature

The correct option is D All the above
Refer Stefan's Law of Radiation: $Q = η σ A δ T^{4}$
where, $σ = c o n d u c t i v i t y A$ = area $T$ = difference of the temperature