Recent content by uhty

that is where my question about signs come from: we have two difefrent signs for the same answer depending on limits order.

what confuse me with integrations -if I integrate from d+L to d-I get different answer, I get lnd/(d+L) instead of ln(d+L)/d but the result should be the same in both cases.

If it was some signless density-replacing half of the rod with negative charge would not produce any difference, but it will obviously be different case which needs two separate integrations. So, I think that having negatively charged rod we must include minus sign into integral and with...

Ok, thank you for explanations. I understand it well in all points except one: why sign of charge has no influence to sign of integral as you suggest? I know that positive charges produce positive potential and negative charges produce negative potential . So, the sign of charge on the rod...

I think you are wrong: the picture explicitly shows positively charged rod. In case of negatively charged rod the sign of potential must be negative, right? The integral then should be taken with negative sign, right? Your explanation that I must understand how equation works is not very...

Homework Statement http://www.phys.uri.edu/~gerhard/PHY204/tsl330.pdf full solution here Homework Equations The Attempt at a Solution Here is solution of problem for positively charged rod. What will be the difference if I take negatively charged rod? Why I start integration from d...