已知一台直流电动机两端的电压为6V,通过电动机的电流为2A,线圈的电阻为0.5Ω.则在1min内电动机消耗的电能为____________J,产生的热量为_________J。 答案:【答案】 720 120【解析】在1min内电动机消耗的电能为W=UIt=6V×2A×60s=720J;1min内线圈产生的热量为Q=I2Rt=(2A)2×0.5Ω×60s=120J。 --What do people drink in America?
--________.
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A.
potatoes and beef
B.
wine and beer
C.
bread and juice
D.
bread and cabbage