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Electric Currents (id: d20fdf0c1)

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admin 发表于 前天 20:25 | 显示全部楼层 |阅读模式
本题目来源于试卷: Electric Currents,类别为 IB物理学

[填空题]
An air conditioner draws b d uawfhw4e1(9eb dbda/)g0112 gwd .k0(q ygr5A at 220-V ac. The connecting cord is copper wire with a diamete5 (k wr0yd.gqgr of 1.628 mm.
(a) How much power does the air conditioner draw?    W
(b) If the total length of wire is 15 m, how much power is dissipated in the wiring? $\approx$   W(Round to the nearest integer)
(c) If no. 12 wire, with a diameter of 2.053 mm, was used instead, how much power would be dissipated? $\approx$   W(Round to the nearest integer)
(d) Assuming that the air conditioner is run 12 h per day, how much money per month (30 days) would be saved by using no. 12 wire? Assume that the cost of electricity is 12 cents per kWh. $\approx$   cents per month (Round to the nearest integer)




参考答案:
空格1: 2640±2%空格2: 17±2%空格3: 11±2%空格4: 28±2%


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