RockwellAllen-Bradley1769OB321746NIO4I1.焦耳定律定义：电流通过导体时所产生的热量Q，跟电流的平方成正比，跟导体的电阻成正比，跟通电的时间成正比。2.焦耳定律公式：Q=I2Rt，适用范围：任何电路。控制变量法：(1)控制电流和电阻相同，研究电热与通电时间的关系(2)控制通电时间和电阻不变，改变电流的大小，研究电热与电流的关系(3)控制通电时间和电流不变，改变电阻大小，研究电热与电阻的关系串并联电路电热关系：串联电路中，电热之比等于电阻之比，并联电路中，电热之比等于电阻的反比“焦耳定律”中的控制变量法：焦耳定律的实验运用了控制变量法，当两段电阻串联时，控制电流和通电时间相同，得出电***生的热量与电阻大小有关，当两电阻并联时，控制电阻和通电时问不变，得出电***生的热量与电流大小有关。例：小宇和小刚想利用如图所示的装置来探究“导体产生的热量与其电阻大小的关系”。两只相同的烧瓶中装有适量的煤油，烧瓶A中浸泡着一段铜丝，电阻较小；烧瓶B中浸泡着一段镍铬合金丝，电阻较大，温度计显示煤油的温度。(1)为保证实验科学合理，两个烧瓶中所装煤油的质量应该相同。(2)实验中，小字和小刚发现B烧瓶中温度计的示数升高得快。这表明：在电流和通电时间相同的情况下，导体的电阻越大，产生的热量越多。解析：(1)利用控制变量法在探究“导体产生的热量与其电阻大小的关系”时应控制其他因素不变，如煤油的质量，相同的烧瓶，相同的温度计等。(2)B瓶中温度计升高得快，说明相同时间内煤油吸收的热量多，由于镍铬合金丝电阻大于铜丝电阻，所以在电流和通电时间相同时，导体电阻越大，产生的热量越多。GEMultilin369-HI-R-0-0-0-0-E369MotorManagementRelayFirmware53CMC350.000GEMULTILINMODELSPM-PFSYNCHRONOUSMOTORCONTROL40A210A0.000USEDGEMultilinSR750FeederManagementRelay750-P5-H1-A20-RFromCanadaGEMULTILINPROTECTIVERELAY120VACMODELMTM-120-P-A20CustomsservicesandinternationaltrackingprovidedGEMultilinFeederSR750-RelayPowerManagementModel750-P5-G5-D5-HI-A20-RCustomsservicesandinternationaltrackingprovidedGEPLUSMULTILINMOTORMANAGEMENTRELAYMODEL269PLUS-100P-120CustomsservicesandinternationaltrackingprovidedNEW*GEMULTILIN350FEEDERPROTECTIONRELAY350-E-P5-G5-H-E-M-C-P-3E-D-H*NIBGEMULTILINSR760760FEEDERMANAGEMENTRELAY760-P1-G1-S1-HI-A1-RNEW*GE345MULTILINTRANSFORMERPROTECTIONRELAY345-E-P5-G5-H-E-M-N-N-2E-D-NGEMULTILIN269PLUSMOTORMANAGEMENTRELAY269PLUS-100P-HINEWNIBGEMULTILIN269PLUSMOTORMANAGEMENTRELAY269PLUS-100P-HIW/SOFTWAREGE(GeneralElectric)Multilin269-10C-H1CustomsservicesandinternationaltrackingprovidedGEMultilinMTMMeterModuleExcellentConditionNEW*GEMULTILINF35FEEDERMANAGEMENTRELAYF35-N00-HLH-F8F-H4A-M4A-PXX-UXX-WXXGEMultilinFeederSR750-RelayPowerManagementModel750-P5-G5-S5-HI-A1-RCustomsservicesandinternationaltrackingprovidedNEW*GEMULTILINSR760760FEEDERMANAGEMENTRELAY760-P1-G1-S1-LO-A1-R-T*NIBGEMultilin565-5-5-O-AFeederManagementRelay565BGEMultilinSR735RelayCustomsservicesandinternationaltrackingprovidedGEMultilinMX350AutoTransferControllerGeneralElectricMX350AutomaticGEGENERALELECTRIC169PLUS-10C-120MULTILIN169MOTORMANAGEMENTRELAY24403GEG60N00HKHF8FH6BM8HPXXUXXWXXMULTILING60GENERATORPROTECTIONSYSTEM**NIB**GEMULTILINTOV4023I030H00CVOLTAGERELAY***NIB***GEMultilin269269Plus-100P-120MotorManagementRelayGeneralElectric269PlusGEMultilin369-HI-R-M-F369MotorManagementRelayFirmware53CMB201.000GEMultilinMIBHighImpedanceDifferentialModuleMIB30HICE00000ProtectionGEGEMultilinT60TransformerManagementRelayT60E00HKHF8NH6CMXXPXXUXXWXXGEGEMultilin***MII-PD512-120SIMotorManagerII***MIIPD512120GeneralElectricGEMultilin***MII-PD511-120SIMotorManagerII***MIIPD511120GeneralElectricGEMultilinPQMPowerQualityMeterGeneralElectricPQMRelayGEMultilinD60LineDistanceRelayD60J03HMHF8LH6NM6NP6CU6CWXXGeneralElectricGEMultilinMMII-PD-1-2-240MM2MotorManagerMMIIPD12240GeneralElectricRelayGEMultilin169169Plus-100P-120MotorManagementRelayGeneralElectric169P100GEMultilinFeederProtectionRelaySR735SR735-5-5-HI-485Ver.#25D152D1.000GEMultilin369-HI-R-M-0-0369MotorManagementRelayFirmware53CMB170.000NEWGEMULTILINfeedermanagementRELAYSR745MODEL#W2P5G5HIARE,newOEMoriginalGEMultilin269269-100P-120MotorManagementRelayGeneralElectric269100P120GEMultilin369-HI-0-M-0-0-0-0369MotorManagementRelayFirmware53CMC340.000GEMultilinPQM-APowerQualityMeterGeneralElectricPQMARelayGEMultilin239MotorProtectionRelayGeneralElectricFirmware64C263***.000GEMultilinF60FeederManagementRelayF60G00HKHF8LH6NMXXP6NUXXW7HGEGEMultilinF35FeederProtectionSystemF35G00HKHF8RH6NM8RP6NU8MW6NF35GEGEMultilinF35FeederProtectionSystemF35G00HKHF8RH6NM8RP6NUXXW6NF35GEGEMultilinHID32HighImpedanceDifferentialModuleHID125VDC8W125VDCGEMultilinC60BreakerManagementRelayC60E00HKHF8LH6EM6CPXXUXXWXXGEGEMULTILIN239MOTORPROTECTION250VAC10ARESISTIVERELAYUSEDFromCanadaGEMultilinPQM-T20-C-APowerQualityMeterGeneralElectricPQMT20CARelayGEMultilinT60TransformerManagementRelayT60G00HCHF8FH6PM8HP6PUXXWXXGEGEMultilinL90LineDifferentialRelayL90G00HCHF8FH6PLXXNXXSXXUXXW7DGEGEMultilinF35MultipleFeederManagementRelayF35G00HCHF8FH6PM8HP6PUXXWXXGEMultilinF60FeederManagementRelayF60G00HCHF8HH6PM8HP6NU8HWXXGEGEMultilinF35MultipleFeederManagementRelayF35G00HCHF8HH6PM8HP6NU8HWXXNEWGEMultilinSR760/SR750FeederProtectionRelay760-P5-G5-S5-HI-A20-R-TNEWGEMULTILINSR735735METERSR735-5-5-LO-485FEEDERPROTECTIONGENERALELECTGEMultilinFeederManagementRelayMIFIIMIFIIPA55E00H100GEMultilinPowerManagementRelaySR469-P5-HI-A20-EFromCanadaNewlylistedGEMultilin565-5-5-0-ARelay(InBox)/FeederManagementGEMultilin369-HI-R-0-0-0-0-E369MotorManagementRelayFirmware53CMC350.000GEMultilinMotorManagementRelay469-P5-HI-A20FromCanadaGEMultilin269MotorManagementRelay269PLUS-100P-120FromCanadaGEMultilin12HFC21B1AInstantaneousOvercurrentRelayHFC21B1AGEMultilinMotorManagementRelaySR469RELAY469-P5-HI-A20FromCanadaGEMultilinMotorManagementRelaySR469RELAYSR469-P5-HI-A1FromCanadaGEMultilinMotorManagementRelay169Plus-100P-120FromCanadaGEMultilinMotorManagementRelay169PLUS-120N-125VDCFromCanadaGEMultilinMotorProtectionRelay239-RTD-AMFromCanadaGEMultilinMotorManager2***MII-PD-512-120FromCanadaGE239MultilinMotorProtectionRelayFromCanadaGEMultilin269MotorManagementRelay269PLUS-10C-120FromCanadaGE269MultilinMotorManagementRelay268PLUS-100P-120FromCanadaGEMultilin269MotorManagementRelay269PLUS-100P-HIFromCanadaGEMultilin269MotorManagementRelay269PLUS-100P-120FromCanadaGEMultilin269MotorManagementRelay269PLUS-120N-120FromCanadaGEMultilin269MotorManagementRelay269PLUS-100P120VACFromCanadaGEMultilinD60LineDistanceRelayModel:D60J03HLHF8LH6NM6KP6NU6EW5F-NEWGEMULTILIN269PLUS100PHIMOTORMANAGEMENTRELAY(NEW)GEPOWERMANAGEMENTMULTILINFEEDERMANAGEMENTRELAYF60GEMultilinSR745TransformerManagementRelay745W2P5G5HIALFromCanadaGEMultilinSR750FeederManagementRelay750-P5-G5-S5-HI-A1-RFromCanadaGEMultilin269MotorManagementRelay269PLUS-120N-120FromCanadaGEMultilinSR750FeederManagementRelay750-P5-H1-A20-RFromCanadaGEMULTILINPROTECTIVERELAY120VACMODELMTM-120-P-A20CustomsservicesandinternationaltrackingprovidedGEMultilinFeederSR750-RelayPowerManagementModel750-P5-G5-D5-HI-A20-RCustomsservicesandinternationaltrackingprovidedGEPLUSMULTILINMOTORMANAGEMENTRELAYMODEL269PLUS-100P-120CustomsservicesandinternationaltrackingprovidedNEW*GEMULTILIN350FEEDERPROTECTIONRELAY350-E-P5-G5-H-E-M-C-P-3E-D-H*NIBGEMULTILINSR760760FEEDERMANAGEMENTRELAY760-P1-G1-S1-HI-A1-RNEW*GE345MULTILINTRANSFORMERPROTECTIONRELAY345-E-P5-G5-H-E-M-N-N-2E-D-NGEMULTILIN269PLUSMOTORMANAGEMENTRELAY269PLUS-100P-HINEWNIBGEMULTILIN269PLUSMOTORMANAGEMENTRELAY269PLUS-100P-HIW/SOFTWAREGE(GeneralElectric)Multilin269-10C-H1CustomsservicesandinternationaltrackingprovidedGEMultilinMTMMeterModuleExcellentConditionNEW*GEMULTILINF35FEEDERMANAGEMENTRELAYF35-N00-HLH-F8F-H4A-M4A-PXX-UXX-WXXGEMultilinFeederSR750-RelayPowerManagementModel750-P5-G5-S5-HI-A1-RCustomsservicesandinternationaltrackingprovidedNEW*GEMULTILINSR760760FEEDERMANAGEMENTRELAY760-P1-G1-S1-LO-A1-R-T*NIBGEMultilin565-5-5-O-AFeederManagementRelay565BGEMultilinSR735RelayCustomsservicesandinternationaltrackingprovidedGEMultilinMX350AutoTransferControllerGeneralElectricMX350AutomaticGEGENERALELECTRIC169PLUS-10C-120MULTILIN169MOTORMANAGEMENTRELAY24403GEG60N00HKHF8FH6BM8HPXXUXXWXXMULTILING60GENERATORPROTECTIONSYSTEM**NIB**GEMULTILINTOV4023I030H00CVOLTAGERELAY***NIB***GEMultilin269269Plus-100P-120MotorManagementRelayGeneralElectric269PlusGEMultilin369-HI-R-M-F369MotorManagementRelayFirmware53CMB201.000GEMultilinMIBHighImpedanceDifferentialModuleMIB30HICE00000ProtectionGEGEMultilinT60TransformerManagementRelayT60E00HKHF8NH6CMXXPXXUXXWXXGE)