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1Դӵ߸ 2綯ܳԵϻʹԵܽͣ3ߺǣ 4ֲԵʹǣ5ɳڴ˵ߣ 6ӵʧ飻7߰۹ࡣ
3.3 ͵ѹ·Ӱ죨1ฺɲƽ⽫·ģƹ·Ѹƽ䵽ϣÿĵΪIߵΪ㣬书ΪP1 = 3I2RƽʱijΪ3IΪ㣬ߵҲΪ3IΪP2 = 23I)2R = 18I2R = 63I2R)ƽʱĵƽʱ6仰˵ƽʱÿʧ1200 kWhƽʱֻʧ200 kWhɴ˿ฺ֪ɵĽDZ2ฺɲƽն·ջٿ豸غƽʱظ
һඨ᷽ʽıתųĴż˱仯ֱ伫ٵķֻ첽綯ת첽綯Ϊ͵綯תӵĴż涨Ӽĸıı䣬תӵ綯תתǶʱȷ˴żһºѸıż伫ٵŵ豸ȱǵ綯ͷ϶࣬ټ١Ϊ˱ת伫ѣת첽綯ñ伫٣伫ֻ첽綯С
ѹӰ죨1ฺɲƽ⽫ӱѹģѹİĺġ±ѹеѹ䣬һѹиɵı仯仯븺ɵƽȡฺɲƽʱѹĸĿɿֻѹĸ֮͡ѧ֪abc 3ڻ㣬ôa+b+c33abc a=b=cʱa+b+cȡСֵa+b+c33abc ǿԼѹķֱΪQaIa2 RQb= Ib2 R Qc =Ic2 RʽIa
ཻ簴u-v-w˳ʱ綯uࡢvࡢwʱ,ɴĴųתҲ˳ʱģɵλǰתλ飩綯ӽuԽuཻ磬vwཻ磬wvཻ磬ʱʱģɴ˲תųתҲʱģҲɵλǰתλ飩ɴ˿Եóۣ綯תųתҲ綯תӵתɽĵģཻ簴u-v-wֱӦ
繤ƷԵʹܵأ¶ȡͻеӦк塢ѧʡʪҳͷյȣӰ죬¶ͨǶԾԵϺ;Եṹϻ֧õءһʵõģ繫ϵԷּҲǽԵԻΪȵȼľԵȼõľԵϵȵȼԵϰļ¶ȿɷΪYAEBFCH߸ȼ伫¶ȷֱΪY90㡢A105㡢E120㡢B130㡢F155㡢H180㡢C180㡣
ˮáฺУͨƵʣƵĹʵϵͳĽܡˮõĹˮõ·ߵĽ㡣P=QH(PʣQHѹͷ)(ͼA)ΪΧɵͳˮͨڡ˷ͨӹ·ԡڷʱQ٣HӣЧʽ͡Ч൱ޡıתټı˱õߣûиı·ԡԭHƽϵݼPϵݼ(ͼA),ұԭĸЧʡԴ˷֮Ч
ڡȦйȹԪԼּ֮ܵ˶Щ˶Ԫ䷢ײֲһϿƵڣƵڡȦƫĻԪваߵӰתȣӶתƵʻƵƵйӴ漴IJƵ𣬳15KHzƵʷΧڣ崦Ƶʶλ2kHz3kHzƵתٹϵСȴתٶбй
ֵԿԽΪͼࡣͳְƼͼƵ飬ƼǸݱеIJϸƷƶƷĽƵǸݱеIJƷIJϸƶƷĽͨеIJƷԵľֵбȽϣƶƷĽĴҲȡĸָȡĵλƷֿԷΪһγ顢γ顢γ
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