电能的输送比较方便,只要用输电导线把电源和用电设备连接起来,就可以输送电能.目前电能的输送如图所示:一、输电过程中减少能量损耗的措施1840年,英国物理学家焦耳建立了焦耳定律,它告诉人们:电流通过导体产生的热量跟电流的二次方、导体的电阻、通电的时间成正比,这是输电线 The transportation of electric energy is more convenient. As long as the transmission line is used to connect the power supply and the electric equipment, electric energy can be transmitted. The current transmission of electric energy is shown as follows: 1. Measure of reducing energy loss during transmission 1840 British physicists Joule established Joule’s law. It tells people that the heat generated by a current passing through a conductor is proportional to the square of the current, the resistance of the conductor, and the time of energization. This is the transmission line.