Recent content by shale

Do resistors in series and parallel obey conservation laws? why? I think yes, because I add individual resistance for the effective resistance ... but why? :| what's a true and deeper explanation for this??

do mean the gaussian surface? ---- 1) Yes, and 2) No.. so total charge enclosed is +2λL should i still use EA=Qenc/εo...? if so then... EA= E2πrL = 2λL/εo (I think I was wrong in my first attempt because i multiplied it to the volume and not the area, λ is always linear density...

i think that this appears to be a capacitor in series, each with separation distance of r1-r2 and r2-r3... using C= epsilon*A/d you can get the individual capacitance and then add it in series... (where d is the separation distance of each capacitor) so C = 1/[(1/C1)+(1/C2)]

Homework Statement Consider the cross sections of two, very long, concentric, metallic, hollow cylinders placed in a vacuum. The small cylinder has inner radius A and outer radius B while the larger cylinder has inner radius 2A and outer radius 2B. Initially the small and big hollow...