A square metal plate of side behaves like an ideal blackbody and is maintained at

PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

A square metal plate of side

0.40\,\text{m}

behaves like an ideal blackbody and is maintained at

1000\,\text{K}

. Taking

\sigma = 5.67\times10^{-8}\,\text{W\,m}^{-2}\text{K}^{-4}

, calculate the total power it radiates. (a)

5.7\,\text{kW}

(b)

18.1\,\text{kW}

(c)

9.1\,\text{kW}

(d)

10.7\,\text{kW}