A rule of thumb used to determine the internal resistance of a source is that it is the open-circuit voltage divided by the short-circuit current. Is this correct? Why or why not?
thx for any help
I thought that I could solve this problem by integration. I can divide two spheres to small circular plates as parallel to each other and consider them as parallel plates. Then, i can add them up. It ain't difficult, but it requires calculus knowledge.
the capacitance of two metal sphere system
What is the capacitance of the two metal sphere system.
*The question has been attached shematically. All the variables are given in the attached file, there is no missing variable.
thx for any help.