SATHEE: Physical World Units and Measurements

Physical World Units and Measurements - Result Question 4

4. The unit of the Stefan-Boltzmann’s constant is

(a) $W / m^{2} K^{4}$

(b) $W / m^{2}$

(d) $W / m^{2} K^{2}$

[2002]

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Answer:

Correct Answer: 4. (a)

Solution:

(a) According to Stefan’s law, $E = σ A T^{4}$ where, $E$ is energy dissipated per second, $A =$ surface area $T =$ absolute temperature

$σ = \frac{E}{A T^{4}} = \frac{W}{m^{2} K^{4}}$

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Physical World Units and Measurements - Result Question 4

4. The unit of the Stefan-Boltzmann’s constant is

Answer:

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