作业帮英文的,我觉得标答有些问题,所以在此求解答
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/11/08 23:47:04
英文的,我觉得标答有些问题,所以在此求解答
a factory gets its electrical power from a generator 2 kilometers away.the two wires connecting the generator to the factory terminals has a resistance of 0.03 ohm per km.when the generator supplies 50 amperes to the factory ,the terminal voltage at the generator is 120 volts.a voltmeter connected to the factory terminals should then read
a factory gets its electrical power from a generator 2 kilometers away.the two wires connecting the generator to the factory terminals has a resistance of 0.03 ohm per km.when the generator supplies 50 amperes to the factory ,the terminal voltage at the generator is 120 volts.a voltmeter connected to the factory terminals should then read
it may be 117Volts
再问： how do you get this? i think the answer should be 118.5 ohms. however the given answer is 114 ohms . that's kinda of weird.
再答： i am not sure about that because i can not imagine how two wires connected. if the answer is 114,i can explain 0.03ohms/km*2km*2=0.12ohms the Volts taken by the wire insistance is 0.12ohms*50amperes=6Volts(U=R*I) So the factory get the Volts is 120-6=114Volts.
再问： how do you get this? i think the answer should be 118.5 ohms. however the given answer is 114 ohms . that's kinda of weird.
再答： i am not sure about that because i can not imagine how two wires connected. if the answer is 114,i can explain 0.03ohms/km*2km*2=0.12ohms the Volts taken by the wire insistance is 0.12ohms*50amperes=6Volts(U=R*I) So the factory get the Volts is 120-6=114Volts.
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