Recent content by dspp

So there must be some rules about the direction of vectors in Electric Field? Sth like the "continuity of direction", otherwise I could say that line 2 (or any other line) is everywhere tangent in the EF. And if there is a rule, what is it?

Thx for your answer. However, I still feel unsatisfied with it. For ex, in my attachment, we have A(+) and B(-). With another article C, how to draw an EL line through C? From the textbook or other sources I've ever read, they just draw like (1). Why don't we draw like (2)? Can we drwa...

Sorry coz my question was a bit ambiguous. Pls have a look at the attachment. What I got stuck is the difference between C and D if they are lying in 2 separate lines. What I actually want to ask is : is there any rule or any equation for each EL line? Thx so much.

Could anyone pls explain to me: what is the similar thing among points in the same Electric Field Line? (I have 2 particles A and B which are + and -, then I have 2 other ones C and D --> how can I know that C and D are lying in 1 EF line or in 2 different lines?) Thx so much.