Recent content by harbour

I am sure this has a simple answer, but I don't seem to get it at the moment. I am going through a derivation of the Boltzmann's distribution by maximising the entropy with the constraints that the sum of the probabilities add to 1 and the average energy is some constant value. My question is...

I get 160/d = 260/(50 - d), which gives me 19km.

Does 'insulate' mean that no current can passed through this point; i.e. the wire is disconnected? Then I completely understand that. The second part might just be a wording of the question that caught me. When they say they apply a potential difference at B, do they mean they gradually...

Homework Statement [/B] A single uniform underground cable linking A to B, 50 km long, has a fault in it at distance d km from end A. This is caused by a break in the insulation at X so that there is a flow of current through a fixed resistance R into the ground. The ground can be taken to be a...