1.

 A thin square steel plate with each side equal to 10 cm is heated by a blacksmith. The rate of radiated energy by the heated plate is 1134 W. The temperature of the hot steel plate is (Stefan's constant \[\sigma =5.67\times {{10}^{-8}}watt\ {{m}^{-2}}{{K}^{-4}}\], emissivity of the plate = 1)                                           [MP PMT 1995]

A.            \[1000\ K\]                            
B.            \[1189\ K\]
C.            \[2000\ K\]                            
D.            \[2378\ K\]
Answer» C.            \[2000\ K\]                            


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