本题目来源于试卷: Physics Unit14: Heat，类别为 通用国际物理
[单选题]
In an electric furnace 6be6r:nxk+g)s69yul )z c-x(k mhk xlused +zkfz(i k1ns;9l()adh aus6z4 rp+yi for refining steel, the temperature is monitored by measuri k(z;i s)hr6si 4y+u1fk(pzn d zlaa+9ng the radiant power emitted through a small hole of area $0.5 \; cm^{2}$. The furnace acts like a blackbody radiator. If it is to be maintained at a temperature of $1650 \; ^{\circ}C$, at what level should the power radiated through the hole be maintained?
A. $20 \; W$
B. $30 \; W$
C. $40 \; W$
D. $50 \; W$
参考答案: C
本题详细解析:
暂无
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