论文部分内容阅读
生活中,经常有这种现象:电炉丝通过导线接到电路里,电炉丝和导线通过的电流相同,电炉丝热得发红,而导线却几乎不发热.为什么会这样?电流通过导体时产生热的多少跟哪些因素有关?让我们一起来探究一下.猜想假设:我们知道电炉丝由电阻较大的材料制成,这样产生的热量会较多;如果电炉工作的时间越长,则产生的热量就会越多;如果通过电炉丝的电流越大(不超过其允许的最大电流值),则产生的热量也会越多.可见,电流产生热的多少可能与__、__和__有关.
Life, often have this phenomenon: electric wire through the wire connected to the circuit, electric wire and wire through the same current, hot wire electric red, while the wire is almost no fever. Why? Current generated through the conductor Assumptions Hypothesis: We know that the electric wire is made of a material with a higher resistance, which generates more heat, and if the electric furnace is operated for a longer period of time, it produces Heat will be more; if the current through the electric wire is larger (not exceeding the maximum allowable current value), the more heat will be generated.It can be seen, the current heat generated by how much __, __ and _ _related.