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(2008?西宁)生活中各式各样的电加热器越来越多,...

(1)中温档工作时,R2被短路,P1=14.4W,U=36V,电阻R1的阻值R1=U2P1=(36V)214.4W=90Ω,答:电阻R1的阻值是90Ω.(2)高温档工作时,R1与R2并联,电路的总电流I总=P2U=36W36V=1A,流过电阻R1的电流I1=UR1=36V90Ω=0.4A,流过电阻R2的电流I2=I总-...

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