ããä¸è¬å¸¸ç¨å°åççµé»ççåçæï¼300Wã500Wã800Wã1000Wã1200Wã1500Wã2000Wçï¼å 为éç¨ä½¿ç¨çµå220Vï¼æ以åèªççµé»ä¹ä¸ç¸åï¼
ãã300Wï¼R=U²/P=220²/300=161.3ï¼Î©ï¼ï¼
ãã500ï¼R=48400/500=96.8Ωï¼
ãã800Wï¼R=48400/800=60.5Ωï¼
ãã1000Wï¼R=48400/1000=48.4Ωï¼
ãã1200Wï¼R=48400/1200=40.3Ωï¼
ãã1500Wï¼R=48400/1500=32.3Ωï¼
ãã2000Wï¼R=48400/2000=24.2Ωã
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