you have two rods a and b, both made of a nonconducting material. initially, neither rod is charged. a sphere carrying 100 units of surplus positive charge is placed close to the left end of rod a. one end of rod b is touched to the right end of rod a for some time interval and then removed. what is the final charge on rod b? explain why.

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

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