论文部分内容阅读
有些物理习题如果按常规思路试图一步一步地求解或列方程组解,可能会很麻烦,甚至无法求解,但如果用★的方法来求解,会显得特别简捷.因为同一导体的电阻大小与它的两端的电压大小和通过的电流大小无关,电阻值的大小可以用R=U_1/I_1=U_2/I_2=(U_2-U_1)/(I_2-I-I_1)=(△U)=(△I)的方法求得,值电阻的大小等于导体前后两次电压的变化量与前后两次对
Some physics exercises can be cumbersome or even impossible to solve if they are solved in the usual way by solving them step by step or solving equations of column equations. However, it is especially simple to solve with the method of ★ because the resistance of the same conductor is the same as that of The magnitude of the voltage across the two terminals is independent of the magnitude of the current passing through. The magnitude of the resistance can be expressed as R = U_1 / I_1 = U_2 / I_2 = (U_2-U_1) / (I_2-I-I_1) = (ΔU) = (ΔI) The value of the resistance equal to the size of the conductor before and after the two changes in voltage and twice before and after the pair