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1、?电功率?课时学习同步检测参考答案DIV.MyFav_13 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_13 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: j
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6、 0cm 0cm 0pt; LINE-HEIGHT: 12pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_13 LI.aTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_13 DIV.aTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10
7、.5pt; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_13 DIV.Section1page: Section1DIV.MyFav_13 OLMARGIN-BOTTOM: 0cmDIV.MyFav_13 ULMARGIN-BOTTOM: 0cm第1课时1电功 220V 10A 30A 1200 2千瓦时 度 36106340 20.8 43000 51031.81045 C 610.5kWh 1.8106(2)1500第2课时1快慢 单位时
8、间内所做的功 PUI 2少 多 3瓦特 千瓦 4D 5140W 20.18A 31210 624000J 400W 711.8104J 2100W 8.08508第3课时1额定电压是220V 额定电功率是25W 40 21.5 6.8 1500 32 小灯泡 滑动变阻器的滑片 2.5 0.5 4B 5B 67.2 20W 18000J 716 23V 8.9V 4.5W第4课时1电流的二次方 电阻 通电时间 焦耳 QI2Rt 22：1 1：2 3电流热效应 电 内 4B 5A 6C 752800J 0.88kWh 848.4 336S第5课时1电能表 总开关 保险丝 并 2火 零 220 地 3越多 大 高 熔断 4C 5B 6A 7330 27 81280 2铜丝的电阻小 ,产生的热量少；铜的熔点高 ,不易熔断 / / / /
