Recent content by Yumrey

Well, it's not like I completely forget concepts, it's just that if I'm told to write a test on that course right now, I won't do well on it. I'm just wondering if it's a common practice to make reviewing old materials a routine.

Hello, I realized that I tend to forget the course material I've learned quickly after the final exam, so I think it may be a good idea to review those material even when I've done the course. Does this happen often to you? How do you deal with it while taking new courses and having other...

But then how should I differentiate the two Vs(which have the exact same expression) such that they'll yield different electric fields?

Homework Statement There are 12 electrons spread on the circumference of a circle with radius R evenly. What's the electric potential at the centre? Then the electrons are concentrated on the upper half of the circle, spread evenly. What's the electric potential at the centre now? Homework...

Hello, I'm a physics student and find this forum to be a good place for asking questions. Cheers~