发布时间:2025-01-30 18:34:01
灯泡正常发光的电阻可以用铭牌上的参数求,R=U^2/P=6(V)^2/6(W)=6欧 当电流为0.7A时灯泡电功率为P=I^2*R=0.7(A)^2*6(欧)=2.94W
什么品牌的电脑显示器质量好显示器什么牌子质量好哪个牌子电脑显示器最好
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